Ok, so i am trying to hand trace some code now and here it is:
#include <stdio.h>
/* Global variables */
int Num4, Num5, Num6, Sum, Diff;
/* Function Prototypes are declared now */
void FindDiff(int, int, int *, int *);
int FindSum(int, int, int);
void main(void)
{
int Num1, Num2, Num3...