Question

How to printf true of false for bool in C

Answer 1

#include <stdio.h>

int main(int argc, char **argv) 
{
    _Bool b = 1;
    
    printf("b = %d\n", b); // b = 1
    
    printf(b ? "true" : "false"); // true
    
    printf("\n");
    
    fputs(b ? "true" : "false", stdout);  // true
    
    return(0);
}


/*
run:

b = 1
true
true

*/

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Answer 2

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

int main(int argc, char **argv) 
{
    bool b = true;
    
    printf("b = %d\n", b); // b = 1
    
    printf(b ? "true" : "false"); // true
    
    printf("\n");
    
    fputs(b ? "true" : "false", stdout);  // true
    
    return(0);
}


/*
run:

b = 1
true
true

*/

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