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

void _helper_2();  // FORWARD DECLARATION is needed because _helper_2(…) is defined below where it is used.

void _helper_1() {  // does not need a declaration because it is defined above where it will be used.
}

int main(int argc, char* argv[]) {
    _helper_1();
    _helper_2();
    return EXIT_SUCCESS;
}

void _helper_2() {
}
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