[flamerzade]

I was trying to create like a test thingy but it's not working (im pretty new to c++ still). help please.

#include <iostream>


int main ()
{
int a;
int b;
int sum;

    cout<<"enter the first value\n";
cin>>a;

    cout<<"enter the second value\n";
cin>>b;

     sum = a + b;

if (sum == 3)
{
    cout<<" you won ";
}
            return 0;
}

[andrewsw]

You have omitted the line

using namespace std;

to allow you to reference cin and cout.

BTW Your post-title should be more descriptive in future (most people will be posting code that doesn't work in some way).

[jjl]

cout and cin are defined in namespace std, think of a namespace as a big bag.
You can open the bag completely in the current scope, allowing you to use everything defined in the std namespace within that scope.

This is done by including

using namespace std; //the namespace is visible to main 

int main() {
   cout<<"Test";

Or you can reach in the bag whenever you need something defined within the std namespace (preferred method)

int main() {
   std::cout<<"Test";

The second method is preferred because it will avoid name clashing with other namespaces.