how to find the ascii code of a character in cpp code example

Example 1: c++ get ascii value of char

#include<iostream>
using namespace std;
int main ()
{
    char c;
    cout << "Enter a character : ";
    cin >> c;
    cout << "ASCII value of " << c <<" is :  " << (int)c;
    return 0;
}

Example 2: get ascii value of string in C++

int main()
{
 char *s="hello";
 while(*s!='\0')
  {
  printf("%c --> %d\n",*s,*s);
  s++;
  }
 return 0;
}