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pSOSystem System Calls - Read

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isalpha pREPC+ <strong>System</strong> <strong>Calls</strong><br />

isalpha Tests for an alphabetic character.<br />

#include <br />

int isalpha(<br />

int c /* character */<br />

)<br />

Description<br />

Arguments<br />

Return Value<br />

Error Codes<br />

Notes<br />

This function tests the value in c (converted to an unsigned char) to see if it is an<br />

uppercase or lowercase letter.<br />

c Specifies the value to be tested.<br />

This function returns a nonzero value if the test result is true. It returns a 0 if the<br />

result is false.<br />

Refer to Appendix B.<br />

Callable From<br />

■ Task<br />

■ ISR<br />

3-76 <strong>pSO<strong>System</strong></strong> <strong>System</strong> <strong>Calls</strong>

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