Isdigit - Analog Devices VISUALDSP++ 3.5 Manual

C Run-Time Library Reference

isdigit

detect decimal digit
Synopsis
#include <ctype.h>
int isdigit(int c);
Description
The function determines if the input character is a decimal digit
isdigit
( ). If the input is not a digit,
0-9
digit,
isdigit
Error Conditions
The function does not return an error condition.
isdigit
Example
#include <ctype.h>
int ch;
for (ch=0; ch<=0x7f; ch++) {
printf("%#04x", ch);
printf("%2s", isdigit(ch) ? "digit" : "");
putchar('\n');
}
See Also
isalpha, isalnum,
3-74
isdigit
returns a non-zero value.
isxdigit
VisualDSP++ 3.5 C/C++ Compiler and Library Manual
returns a zero. If the input is a
for ADSP-219x DSPs