C库函数 isxdigit()

#include <stdio.h>

#include <ctype.h>



int main () {

   char var1[] = "tuts";

   char var2[] = "0xE";



   if( isxdigit(var1[0]) ) {

      printf("var1 = |%s| is hexadecimal character\n", var1 );

   } else {

      printf("var1 = |%s| is not hexadecimal character\n", var1 );

   }



   if( isxdigit(var2[0] )) {

      printf("var2 = |%s| is hexadecimal character\n", var2 );

   } else {

      printf("var2 = |%s| is not hexadecimal character\n", var2 );

   }



   return(0);

}