C language get the ASCII code value of a character

/*
Example：view ASCII values of characters  in C language
*/

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <stdbool.h>

int main(int argc, char *argv[]) {
    char chr = 'a';

    printf("char: %c.\n", chr);
    printf("ASCII value %d.", chr);
    return 0;
}