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

int main(int argc, char* argv[]) {
    char* s1   = "ABC";  // string on the DATA SEGMENT
             // s1 is the address of string on the data segment.
             // The characters ('A', 'B', 'C') are on the data segment.
             // The address where the characters can be found is on the stack segment.

    char  s2[] = "ABC";  // string on the STACK SEGMENT
                         // s2 is an array of char's on the stack segment.
    
    char s3[] = { 'A', 'B', 'C', '\0' };
    char s4[] = { 65, 66, 67, 0 };
    printf("s1 == \"%s\"\n", s1);
    printf("s2 == \"%s\"\n", s2);
    printf("s3 == \"%s\"\n", s3);
    printf("s4 == \"%s\"\n", s4);

    //char fmt_s4[] = "s4 == \"%s\"\n";  // would also work
    //char fmt_s4[] = { 's', '4', ' ', '=', '=', ' ', '\"', '%', 's', '\"', '\n' }; // BUG!!!
    char fmt_s4[] = { 's', '4', ' ', '=', '=', ' ', '\"', '%', 's', '\"', '\n', '\0' };
    printf(fmt_s4, s4);

    return EXIT_SUCCESS;
}

/*
 char fmt[] = "s1 == %s\n"
 // how many characters are in fmt.
 { 's', '1', ' ', '=', '=', ' ', '%', 's', '\n' } 
 */
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */

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