How do I get the following code to compile in C++?

I am getting errors: initializing argument 1 of pid_t wait(int*)

and:

error: invalid conversion from int to int* [-fpermissive]

#include #include #include

using namespace std;

int main () {

int val = 5; int pid;

if (pid = fork()) wait(pid); val++; printf("%d ", val); return val;

}