Hello World in C++ does not compile

Question

I am reading the book "C++ Language Training", but this teaching all wrong. The hello world of the book simply does not compile:

#include <iostream.h>
void main() {
cout << "Primeiro Programa";
}

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Answer 1

If it really is like this the book is very bad, throw it away and look for a better.

There are some problems in this code

• In C++ include files do not carry the suffix .h as in C. Therein lies the statement of cout (the files are usually .hpp but import in the code does not use the extension).
• Function definitions must have parentheses after their name.
• The return of function main() must be a whole.
• The cout need your full name, ie, std::cout.

Thus compiles:

#include <iostream>

int main() {
    std::cout << "Primeiro Programa";
}

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.

A variation used when the program starts to become more complex (not that it compensates in this case, only to show something very used):

#include <iostream>
using std;

int main() {
    cout << "Primeiro Programa";
}