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

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

    char ch = '0';

    int  n1 = 48;  // do not do this in your code if you mean character zero.

    int  n2 = 0x30;  // this is "forty-eight", the ASCII value for character zero.

    printf("ch == '%c'\n", ch);
    printf("n1 == '%c'\n", n1);
    printf("n2 == '%c'\n", n2);

    printf("ch == %d\n", ch);
    printf("n1 == %d\n", n1);
    printf("n2 == %d\n", n2);
    
    return EXIT_SUCCESS;
}
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