Small Steps VI — Growing into C++

Showing where a name belongs

Show where a name belongs.

What you will learn

A namespace groups names to distinguish them. :: identifies the namespace a name belongs to.

Try it

#include <iostream>
#include <string>

void small_main()
{
    Small::String small_text = "Small namespace";
    Small::print(small_text);

    std::string standard_text = "Standard namespace";
    std::cout << standard_text << "\n";
}

Small::print and std::cout are different tools. The example prints Small namespace and Standard namespace in that order.

A namespace is not an object. Distinguish the dot in window.show() from :: in Small::print.

Exercise

Create std::string name, read a line with std::getline(std::cin, name), and print it back with std::cout.

#include <iostream>
#include <string>

void small_main()
{
    std::string name;

    // Ask for a name, read a line, and print it.
}

Hint

Include <iostream> and <string>, print a prompt with cout, then call getline.

#include <iostream>
#include <string>

void small_main()
{
    std::string name;

    std::cout << "Name: ";
    std::getline(std::cin, name);
    std::cout << "Hello, " << name << "\n";
}