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

int main(int argc, char* argv[]) {
    
    char s[] = "ABC";  // double quotes include '\0' implicitly.
    for(int i = 0; s[i] != '0'; i++) { // BUG  '0' should be '\0'
    // for(int i = 0; s[i] != '\0'; i++) { // CORRECT
        fputc(s[i], stdout); // print a single character to stdout (terminal output)
    }
    fputc('\n', stdout);
    
    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */

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