C library functions - isxdigit ()

C standard library - <ctype.h>

description

Whether the C library functionint isxdigit (int c) Check the transmission character is hexadecimal number.

statement

Here is () statement isxdigit function.

int isxdigit(int c);

parameter

• c - This was a test of character.

return value

If c is a hexadecimal number, the function returns a nonzero value (true), otherwise it returns 0 (false).

Examples

The following example demonstrates isxdigit () function is used.

#include <stdio.h>
#include <ctype.h>

int main()
{
   char var1[] = "tuts";
   char var2[] = "0xE";
  
   if( isxdigit(var1[0]) )
   {
     printf("var1 = |%s| 是十六进制数字\n", var1 );
   }
   else
   {
     printf("var1 = |%s| 不是十六进制数字\n", var1 );
   }
   
   if( isxdigit(var2[0] ))
   {
     printf("var2 = |%s| 是十六进制数字\n", var2 );
   }
   else
   {
     printf("var2 = |%s| 不是十六进制数字\n", var2 );
   }
   
   return(0);
}

Let's compile and run the above program, which will result in the following:

var1 = |tuts| 不是十六进制数字
var2 = |0xE| 是十六进制数字

C standard library - <ctype.h>