Part 1: Listing for swap n add.c 1 int swap n add(int *xp, lnt *yp) { 2 int x = *xp; int y -yp; 4 7 return x + y; 10 int main(int argc, char **argv) { int al 534; int a2 = 1057; int sum swap_n add (&a1, &a2); int diff a1 - a2 ; 12 13 14 15 16 17h return sum * diff