How to convert characters into corresponding ascii codes

/*
Example:  How to convert character to ascii code in c language
*/

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char const *argv[]) {

    char chr = 'G';
    int ascii = (int) chr;
    printf("The ascii code is: %d\n", ascii);

    return 0;

}

output：

The ascii code is: 71