Question

How to print the file name, line number and function name in debug message in C

Answer 1

#include <stdio.h>

int main(int argc, char **argv) 
{
    printf("file = %s \nfunction = %s \nline = %d\n", __FILE__, __func__, __LINE__);

    return 0;
}

/*
run:

file = D:/c_examples/main.c
function = main
line = 5

*/

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Answer 2

#include <stdio.h>

void testFunction(void);

int main(int argc, char **argv) 
{
    testFunction();

    return 0;
}
void testFunction(void)
{
    printf("file = %s \nfunction = %s \nline = %d\n", __FILE__, __func__, __LINE__);
}

/*
run:

file = D:/c_examples/main.c
function = testFunction
line = 13

*/

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