c++ function to check if a character is a digit code example

Example 1: check if character in string is alphabet c++

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

int main() {
   char val1 = 's';
   char val2 = '8';

   if(isalpha(val1))
   printf("The character is an alphabet\n");
   else
   printf("The character is not an alphabet\n");

   if(isalpha(val2))
   printf("The character is an alphabet\n");
   else
   printf("The character is not an alphabet");

   return 0;
}

Example 2: c++ check if char is number

char c = '1';
bool result = isdigit(c);
cout << result << endl; //1