An example where we wrap a sum(int, int) call in a wrapper function.

sum3.cpp

/* Prototypes */
int sum(int, int);
void wrapper(int, int);

/* Main program */

int main()
{
  
  wrapper(1,1); //  We pass in the two values instead.

  return 0;
}

/* Program definition */

void wrapper(int xToAdd, int yToAdd){
  int z = sum(xToAdd, yToAdd);  //  z will become 2 here
}

int sum(int x, int y)
{
  return x+y;
}