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DBL_MAX Description: Maximum finite double precision floating point value Include: Value: 3.402823e+38 by default, 1.797693e+308 if the switch -fno-short-doubleis used Remarks: By default, a double type is the samesize as a float type (32-bit representation). The -fno-short-doubleswitch allows the IEEE 64-bit representation to be used for a double precision floating point value. Standard C Libraries with Math Functions 2004 Microchip Technology Inc. DS51456B-page 207 DBL_MAX_10_EXP Description: Maximum integer value for a double precision floating point exponent in base 10 Include: Value: 38 by default, 308 if the switch -fno-short-doubleis used Remarks: By default, a double type is the samesize as a float type (32-bit representation). The -fno-short-doubleswitch allows the IEEE 64-bit representation to be used for a double precision floating point value. DBL_MAX_EXP Description: Maximum integer value for a double precision floating point exponent in base FLT_RADIX Include: Value: 128 by default, 1024 if the switch -fno-short-doubleis used Remarks: By default, a double type is the samesize as a float type (32-bit representation). The -fno-short-doubleswitch allows the IEEE 64-bit representation to be used for a double precision floating point value. DBL_MIN Description: Minimum double precision floating point value Include: Value: 1.175494e-38 by default, 2.225074e-308 if the switch -fno-short-doubleis used Remarks: By default, a double type is the samesize as a float type (32-bit representation). The -fno-short-doubleswitch allows the IEEE 64-bit representation to be used for a double precision floating point value. Bao gồm: Giá trị: 15 dsPIC ® Thư viện Công cụ Ngôn ngữ DS51456B trang 210 2004 Microchip Technology Inc LDBL_EPSILON Mô tả: Sự khác biệt giữa 1.0 và dài biểu diễn lớn hơn tiếp theo độ chính xác gấp đôi giá trị dấu chấm động Bao gồm: Giá trị: 2.220446e-16 LDBL_MANT_DIG Mô tả: Số chữ số cơ sở-FLT_RADIX trong một độ chính xác kép dài điểm nổi significand Bao gồm: Giá trị: 53 LDBL_MAX Mô tả: hữu hạn dài gấp đôi độ chính xác giá trị nổi điểm tối đa Bao gồm: Giá trị: 1.797693e + 308 LDBL_MAX_10_EXP Mô tả: giá trị số nguyên tối đa cho một độ chính xác kép dài dấu chấm động số mũ cơ số 10 Bao gồm: Giá trị: 308 LDBL_MAX_EXP Mô tả: giá trị số nguyên tối đa cho một độ chính xác kép dài dấu chấm động mũ trong FLT_RADIX cơ sở Bao gồm: Giá trị: 1024 LDBL_MIN Mô tả: độ chính xác kép dài giá trị nổi-điểm tối thiểu Bao gồm: Giá trị: 2.225074e-308 LDBL_MIN_10_EXP Mô tả: Giá trị số nguyên âm tối thiểu cho một độ chính xác kép dài điểm nổi số mũ cơ số 10 Bao gồm: Giá trị: -307
DBL_MIN_10_EXP Description: Minimum negative integer value for a double precision floating point exponent in base 10 Include: Value: -37 by default, -307 if the switch -fno-short-doubleis used Remarks: By default, a double type is the samesize as a float type (32-bit representation). The -fno-short-doubleswitch allows the IEEE 64-bit representation to be used for a double precision floating point value. dsPIC ® Language Tools Libraries DS51456B-page 208 DBL_MIN_EXP 2004 Microchip Technology Inc. Description: Minimum negative integer value for a double precision floating point exponent in base FLT_RADIX Include: Value: -125 by default, -1021 if the switch -fno-short-doubleis used Remarks: By default, a double type is the samesize as a float type (32-bit representation). The -fno-short-doubleswitch allows the IEEE 64-bit representation to be used for a double precision floating point value. FLT_DIG Description: Number of decimal digits of precision in a single precision floating point value Include: Value: 6 FLT_EPSILON Description: The difference between 1.0 and the next larger representable single precision floating point value Include: Value: 1.192093e-07 FLT_MANT_DIG Description: Number of base-FLT_RADIXdigits in a single precision floatingpoint significand Include: Value: 24 Thư viện chuẩn C với hàm toán học 2004 Microchip Technology Inc DS51456B trang 211 4.7 GIỚI HẠN THỰC HIỆN-ĐỊNH NGHĨA Các limits.hconsists tập tin tiêu đề của các macro để xác định tối thiểu và tối đa giá trị của các loại nguyên. Mỗi một macro có thể được sử dụng trong #ifpreprocessing chỉ thị. LDBL_MIN_EXP Mô tả: Giá trị số nguyên âm tối thiểu cho một độ chính xác kép dài điểm nổi mũ trong FLT_RADIX cơ sở Bao gồm: Giá trị: -1021 CHAR_BIT Mô tả: Số bit để đại diện cho kiểu char Bao gồm: Giá trị: 8 CHAR_MAX Mô tả: Giá trị tối đa của một char Bao gồm: Giá trị: 127 CHAR_MIN Mô tả: Giá trị tối thiểu của một char Bao gồm: Giá trị: -128 INT_MAX Mô tả: Giá trị tối đa của một int Bao gồm: Giá trị: 32767 INT_MIN Mô tả: Giá trị tối thiểu của một int Bao gồm: Giá trị: -32768 LLONG_MAX Mô tả: Giá trị tối đa của một int dài dài Bao gồm: Giá trị: 9223372036854775807 dsPIC ® Thư viện Công cụ Ngôn ngữ DS51456B trang 212 2004 Microchip Technology Inc
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2004 Microchip Technology Inc. DS51
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dsPIC ®LANGUAGE TOOLS LIBRARIES 20
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215 4.11 variable argument lists .
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and macros for standard C operation
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This documentation is provided on t
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• Development Systems Information
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data section. The alternate startup
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specific libraries.) When compiling
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esults will occur when the function
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A batch file named makedsplib.batis
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-15 or smaller than -1.0. Analogous
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CORCON saved, used, restored DOand
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fractional* srcV ); Arguments: numE
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VectorCorrelateis 4 less than whate
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less than or equal to any previous
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Remarks: The negated value of 0x800
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Cycles (including C-function call a
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plus program words from VectorCopy
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Prototype: extern fractional* Black
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); Arguments: numElems number of el
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the base address of the matrix. Bec
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in default RAM memory space (X-Data
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0 ≤i < numRows1 0 ≤j < numCols2
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20 + 3(numRows*numCols) MatrixSubtr
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(of the same dimension) whose eleme
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history of the filter. After perfor
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Oppenheim and Ronald Schafer’s Di
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modulo buffer. Source samples, x[n]
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FIRDelayInit Description: FIRDelayI
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filter. Include: dsp.h Prototype: e
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FIRStruct* filter, fractional* refS
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energyEstimate estimated energy val
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fractional* delayBase ); Arguments:
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Source File: iircan.asm DSP Library
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srcSamps pointer to source samples
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} IIRTransposedStruct; extern fract
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no REPEATinstructions Program words
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Language Tools Libraries DS51456B-p
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for instance if: a = Op1 (b, c), wi
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and stores the results in the desti
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Description: DCTIPcomputes the Disc
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int log2N, fractcomplex* dstCV, fra
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fractcomplex* srcCV, fractcomplex*
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value can be calculated using the i
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A complex vector of size N/2 must h
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specific libraries. When compiling
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Control I/O pin definitions RW_PIN
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y calling the BusyXLCD()function. T
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COM1_COM16 COM16_COM1 Display On/Of
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Source File: CAN1AbortAll.c CAN2Abo
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char CAN2IsRXPassive(void); Argumen
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CAN2SendMessage Description: This f
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CAN2SetMask Description: This funct
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CAN_IDLE_CON_NO_WAITCAN On in Idle
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CAN_INDI_INVMESS_DIS CAN_INDI_WAK_D
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{ /* Length of data tobe transmitte
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Return Value: If the value of DONE
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dsPIC Peripheral Libraries 2004 Mic
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..... SKIP_SCAN_AN15 Return Value:
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DS51456B-page 100 3.5.2 Individual
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3.6 ADC10 FUNCTIONS This section co
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Module On/Off ADC_MODULE_ON ADC_MOD
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ADPCFG register as defined below: E
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ADC_CHX_NEG_SAMPLEB_AN6AN7AN8 ADC_C
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Scanselect = SKIP_SCAN_AN2 & SKIP_S
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dsPIC ® Language Tools Libraries D
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void OpenTimer4(unsigned int config
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Tx_SOURCE_EXT Tx_SOURCE_INT period
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3.7.2 Individual Macros WriteTimer2
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SetPriorityIntT4 SetPriorityIntT5 D
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Code Example: char reset_state; res
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Arguments: None Remarks: This macro
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stored into CNPU2 register. The upp
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SetPriorityInt2 SetPriorityInt3 Set
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IC_INT_PRIOR_3 IC_INT_PRIOR_4 IC_IN
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ReadCapture3 ReadCapture4 ReadCaptu
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void CloseOC4(void); void CloseOC5(
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Include: outcompare.h Prototype: vo
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Include: outcompare.h Prototype: un
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SetDCOC3PWM SetDCOC4PWM SetDCOC5PWM
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Code Example: pulse_start = 0x40 ;
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T3CON = 0x8000; T1CON = 0X8000; /*
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Transmit Interrupt Priority UART_TX
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UART_1STOPBIT config2 This contains
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Source File: WriteUART1.c WriteUART
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Code Example: EnableIntU2TX; Disabl
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ConfigIntUART1(UART_RX_INT_EN & UAR
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DCI_INT_PRI_4 DCI_INT_PRI_5 DCI_INT
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DCI_FRAME_LEN_15 DCI_FRAME_LEN_14 .
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Prototype: unsigned int ReadDCI(uns
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contents are sent duringthe timeslo
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SPI_INT_PRI_4 SPI_INT_PRI_5 SPI_INT
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Prototype: void WriteSPI1(unsigned
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Remarks: This functions initializes
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2004 Microchip Technology Inc. DS51
Page 197 and 198: SEC_PRESCAL_7_1 & PRI_PRESCAL_64_1;
Page 199 and 200: enables/disables the interrupt. Sou
Page 201 and 202: QEI_QE_CLK_DIVIDE_1_32 QEI_QE_CLK_D
Page 203 and 204: } int main(void) { unsigned int max
Page 205 and 206: dsPIC ® Language Tools Libraries D
Page 207 and 208: PWM_PEN2H PWM_PDIS2H PWM_PEN1H PWM_
Page 209 and 210: PWM_POUT_1L Bit defines related to
Page 211 and 212: PWM_DTS3I_UA PWM_DTS3I_UB Dead Time
Page 213 and 214: PWM_OVA3H_INACTIVE PWM_OVA2H_INACTI
Page 215 and 216: Language Tools Libraries DS51456B-p
Page 217 and 218: #include #include void __attribute
Page 219 and 220: Prototype: void ConfigIntI2C(unsign
Page 221 and 222: Arguments: None Return Value None R
Page 223 and 224: a #definestatement in the i2c.h Sou
Page 225 and 226: I2C_IDLE_CON SCL Release Control bi
Page 227 and 228: i2c_data_wait This is the timeout c
Page 229 and 230: 3.17.2 Individual Macros StartI2C D
Page 231 and 232: Arguments: None Remarks: This macro
Page 233 and 234: • src\libm- source code for math
Page 235 and 236: Remarks: The expression evaluates t
Page 237 and 238: if (isalpha(ch)) printf("# is alpha
Page 239 and 240: Remarks: A character is considered
Page 241 and 242: ch = '&'; if (isprint(ch)) printf("
Page 245 and 246: int ch; ch = 'B'; printf("B changes
Page 247: dsPIC ® Language Tools Libraries D
Page 251 and 252: Include: Value: 1 Remarks: Rounds
Page 253 and 254: Description: Maximum value of a lon
Page 257 and 258: abort - terminating See the example
Page 259 and 260: dsPIC ® Language Tools Libraries D
Page 261 and 262: } Output: Illegal instruction execu
Page 263 and 264: must be at least one named argument
Page 265 and 266: Include: Prototype: #define va_end
Page 267 and 268: to perform input and output operati
Page 269 and 270: _IOLBF Description: Indicates line
Page 271 and 272: Include: Prototype: void clearerr(
Page 273 and 274: Include: Prototype: int feof(FILE
Page 275 and 276: Error indicator reset Standard C Li
Page 277 and 278: fpos_t pos; char buf[25]; if ((myfi
Page 279 and 280: Description: Opens a file. Include:
Page 281 and 282: Explanation: afile1must exist befor
Page 283 and 284: Arguments: s string to be written s
Page 285 and 286: 10.0/2 = 5.000000 10.0/3 = 3.333333
Page 287 and 288: Explanation: This program uses myfi
Page 289 and 290: SEEK_CUR- seeks from the current po
Page 291 and 292: *pos if successful; otherwise, fset
Page 293 and 294: if ((myfile = fopen("afile.out", "r
Page 295 and 296: 10.0/2 = 5.000000 10.0/3 = 3.333333
Page 297 and 298: Return Value: Returns the character
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Standard C Libraries with Math Func
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e, E doublein scientific notation f
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putchar Description: Put a characte
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Output: File renamed dsPIC ® Langu
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® Language Tools Libraries DS51456
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setbuf(myfile1, NULL); printf("myfi
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int main(void) { char sbuf[100], s[
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Include: Prototype: char *tmpnam(c
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ungetc (Continued) Standard C Libra
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va_list ap; va_start(ap, fmt); prin
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with operands of type long. Include
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i = -2; printf("The absolute value
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(int) strtol(s,0,10)except it does
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eturn 0; else return 1; } Output: S
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printf("For div(%d, %d)\n", x, y);
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free Description: Frees memory. Inc
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printf("The absolute value of %7ld
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is undefined. malloc Description: A
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with the key Remarks: qsortoverwrit
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object. If reallocsucceeds in alloc
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optional whitespace, followed by an
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® Language Tools Libraries DS51456
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Prototype: size_t wcstombs(char *s,
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characters in s2and returns a value
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printf("\n"); memcpy(buf1, buf3, 5)
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printf("\n"); printf("memset(\"%s\"
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printf("buf1 : %s\n\n", buf1); ptr
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uf3 : Why? buf2 comes before buf1 b
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str1, str2, res); res = strcspn(str
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(string length = 11 characters) str
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s2 second string n number of charac
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printf("buf1 : %s\n", buf1); printf
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contained in s2. Example: #include
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else printf("%c not found\n", ch2);
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printf("\"%s\" found at position %d
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Output: str1 : Here, on top of the
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MMMis month of the year ddis day of
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printf("Local time = %s\n", asctime
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Example: #include /* for strftime,
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(in magnitude) to be represented in
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Argument: x value between -1 and 1
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y = atan (x); printf("The arctangen
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if (errno) perror("Error"); printf(
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for (i=0; i
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} Output: The cosine of -1.000000 i
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Error: range error The hyperbolic c
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errno = 0; x = -1E3; y = exp (x); i
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y = fabs (x); printf("The absolute
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-2.0F, -1.75F, -1.5F, -1.25F}; floa
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x, y, z); errno = 0; x = 7.0; y = 0
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perror("Error"); printf("For fmodf
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Return Value: Returns the fraction,
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printf("For a number = %fand an exp
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ldexpf(-0.625000, 2) = -2.500000 Fo
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x, y); errno = 0; x = 0.0; y = log1
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NaN is returned if xis a negative n
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Arguments: x single precision float
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The sine of -1.000000 is -0.841471
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The hyperbolic sine of 0.000000 is
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Error: domain error The square root
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Return Value: Returns the tangent o
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x, y); } Output: The hyperbolic tan
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the calling process's data segment.
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eginning of the file. A return valu
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through the simulator. The return v
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uffer points to the storage locatio
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div.sd __builtin_divud Description:
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mul.uu dsPIC ® Language Tools Libr
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Return Value: Returns the psv page
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__builtin_mulus ...................
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arcsine Double Floating Point......
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Set Priority Macro.................
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isxdigit...........................
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String to Unsigned LongInteger ....
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DCT................................
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EnableIntlCx.......................
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Single Floating Point .............
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DBL_MAX_10_EXP ....................
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Single Floating Point..............
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tanhf .............................
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Set Capture Interrupt Priority ....
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ldiv_t ............................
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long long unsigned int Maximum Valu
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MatrixInvert ......................
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Single Floating Point..............
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system.............................
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Quick Sort ........................
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SEEK_SET...........................
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Minimum Value .....................
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va_arg ............................
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atoi ..............................
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strncpy ...........................
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Write..............................
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unsigned short int Maximum Value ..
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Zero, divide by....................
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