Question

How to add message to assert in C

Answer 1

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

int main() {
	int a = 1;
	
	// expression == FALSE
	assert(a == 5 && "Some error message"); // abort program when a is not 5

	puts("main");

	return 0;
}





/*
run:
 
Assertion failed: a == 5 && "Some error message", file test.c, line 8
 
*/

 

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