trying out fork() and wait(), compiler seems to forget what dereferencing is

[hybzik]

#include <stdlib.h>
	//recommended headers for wait(), if CC says wait not defined, try these:
//	#include <sys/types.h>
//	#include <sys/stat.h>
#include<iostream>
using namespace std;

int main()
{
	int array[4];
	
	int id;
	int *res;
	int ret;
	
	for (int count = 0; count < 4 ; count++)
	{
		array[count] = count*100;
	}
	
	id  = fork();
	
	if (id == 0)
	{
		cout << "kid" << endl;
		return 99;
	}
	
	else
	{
		wait(res);
		ret = ( *res);
		cout << res;
		cout << ret;
	}
	
	return 0;
}

That's a small program I wrote to get a feel for fork() and wait(), but I've ended up with a ridiculous compiler error:

forker.cpp:37: error: no match for ‘operator*’ in ‘*res’
forker.cpp:38: error: no match for ‘operator<<’ in ‘std::cout << res’
forker.cpp:13: warning: unused variable ‘res’

the first error seems to say that it doesn't know what the dereference operator does. I thought that I could be passing wait() an incorrect type, but my notes and the error messages don't seem to say that anything is wrong with that.

I also know that some of the code doesn't really amount to any result, but this is just a small incomplete program for trying out syntax.

[jsmith]

wait is undeclared (which is not at all what the compiler is saying, but comment out line 31 and watch it compile cleanly).

Then include

#include <sys/types.h>
#include <sys/wait.h>