#include <stdio.h>
// function prototypes
int sum3(int a, int b, int c); 
void printPrompt(void);

int main(void)
{
	int y = sum3(10, 15, 17); // y should be 42 after this line.

	printf("sum3 result: %d\n", y);
	printPrompt();
}

// Returns the sum of the three input variables 
int sum3(int a, int b, int c) {
	int result = a + b + c;
	return result;
}

// printPrompt() prints a user prompt to the console.
void printPrompt(void) {
	printf("Please enter a number from 1-3:\n");
}