Isxdigit String Test Function application Example

Prototype: int isxdigit (int c); header file: ctype.h function: Check if parameter C is a 16-digit number, as long as C is one of the following conditions returns TRUE. 16 binary number: 0123456789ABCDEF. Return value: Returns true if the parameter C is 16 digits, otherwise null (0) is returned. Additional notes: This is a macro definition, not a real function.

Function Simulation Source code:

int isxdigit (int c) {    return (' 0 ' <= C && c <= ' 9 ') | | (' A ' <= c && c <= ' F ') | | (' A ' <= C && c <= ' F ');}

Application Examples:

#include <stdio.h> #include <ctype.h>main () {    char str[]= "A3 4%8}9 [e*&^%?";    int i = 0;    for (i=0;str[i]!=0;i++)    {        if (Isxdigit (Str[i]))        {            printf ("%c is hexadecimal number \ n", Str[i]);        }        else        {            printf ("%c is not hexadecimal number \ n", Str[i]);}        }}    

Operation Result:

Isxdigit String Test Function application Example