Errorss.....

[Legendman3]

Hey im getting a couple of compile errors in this thing im trying to compile could someone help me out? (p.s. I have no clue what it does i found it in a book)

#include <iostream>
using namespace std;

namespace Stack {
    void push(char);
    char pop();
}

void f()
{
    Stack::push('c');
    if(Stack::pop() != 'c') error("impossible");
}

In function `void f()'
12 `error' undeclared (first use this function) 

[chrisname]

You can't have copied it right; that code makes no sense. If you've copied it right, the book is wrong.

[Thumper]

Your compiler error is telling you that it doesn't know what the function error() is.
Like chrisname said, the code makes no sense. Maybe you're leaving something out?

[m4ster r0shi]

Did you copy it from Stroustrup's book, modular programming paragraph? It won't compile, those examples aren't meant to compile. He just uses them to demonstrate different programming styles.