// Use a global variable to find and print the maximum of 3 numbers
#include <stdio.h>

int max; // global variable holding the maximum value

void findMax(int a, int b, int c) { 
	max = a;
	if (b > max) {
		if (c > b) max = c; 
		else max = b;
	} else if (c > max) max = c; 
}

void printMax(void) {
	printf("The maximum number is: %d\n", max);
}

int main(void) {
	findMax(4, 3, 7);
	printMax();
}