For Xcode app

Programming language: C

3.2 Task Two Since C passes arguments to functions by value, there is no direct way for the called functionto alter a variable in the calling function. For instance, a sorting routine might exchange two out-of-order arguments with a function called swap. It is not enough to write a function swap (a,b) like the following void swap (int x, int y) WRONG int temp; tempx: y temp; Because of call by value, swap can't affect the arguments a and b in the routine that called it. The function above swaps copies of a and b. The way to obtain the desired effect is for the calling program to pass pointers to the values to be changed: swap (&a, &b); Please complete the function swap