macros-in-c-6.c

#include <stdio.h>

#define printErrord(errorCode) printError(errorCode, "No message")

void printError(int errorCode, char *msg)
{
	printf("Error code: %d (%s)\n", errorCode, msg);
}

int main(int argc, char *argv[])
{
	printError(9, "Bad alloc");
	printErrord(8);
}