o_195h4n6al16jb186b1b2qs7fgssa.pdf

*pos
if successful; otherwise, fsetpossets errno.
fseek (Continued)
dsPIC
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printf ("10,0 /% d =% f \ n", x + 1, nums [x]);
}
numwrote = fwrite (nums, sizeof (double),
10, buf);
printf ("đã viết% dnumbers \ n \ n", numwrote);
fclose (buf);
DS51456B-page 246
2004 Microchip Technology Inc.
}
Example: /* This program opens a file and reads bytes at */
/* several different locations. The fgetpos */
/* function notes the 8th byte. 21 bytes are */
/* read then 18 bytes are read. Next the */
/* fsetpos function is set based on the */
/* fgetpos position and theprevious 21 bytes */
/* are reread. */
#include /* for fgetpos, fread, */
/* printf, fopen, fclose, */
/* FILE, NULL, perror, */
/* fpos_t, sizeof */
int main(void)
{
FILE *myfile;
fpos_t pos;
char buf[25];
if ((myfile = fopen("sampfgetpos.c", "rb")) ==
NULL)
printf("Cannot open file\n");
else
{
fread(buf, sizeof(char), 8, myfile);
if (fgetpos(myfile, &pos) != 0)
perror("fgetpos error");
else
{
fread(buf, sizeof(char), 21, myfile);
printf("Bytes read: %.21s\n", buf);
fread(buf, sizeof(char), 18, myfile);
printf("Bytes read: %.18s\n", buf);
}
if (fsetpos(myfile, &pos) != 0)
khác
printf ("Không thể mở afile.out \ n");
Thư viện chuẩn C với hàm toán học
2004 Microchip Technology Inc DS51456B trang 249
if ((buf = fopen ("afile.out", "r +")) = NULL)
{
numread = fread (readnums, sizeof (double),
10, buf);
printf ("Đọc% số d \ n", numread);
for (x = 0; x