Qualified Names

The :: operator chooses a name from a specific namespace.

qualified_names.cpp

#include <iostream>
#include <string>

namespace checkout {
std::string status(int cents) {
    if (cents >= 1000) {
        return "large";
    }
    return "small";
}
}

int main() {
    int totalCents = ;

    std::string size = checkout::status(totalCents);

    std::cout << "totalCents=" << totalCents << std::endl;
    std::cout << "status=" << size << std::endl;
    return 0;
}

#include <iostream>
#include <string>

namespace checkout {
std::string status(int cents) {
    if (cents >= 1000) {
        return "large";
    }
    return "small";
}
}

int main() {
    int totalCents = ;

    std::string size = checkout::status(totalCents);

    std::cout << "totalCents=" << totalCents << std::endl;
    std::cout << "status=" << size << std::endl;
    return 0;
}

#include <iostream>
#include <string>

namespace checkout {
std::string status(int cents) {
    if (cents >= 1000) {
        return "large";
    }
    return "small";
}
}

int main() {
    int totalCents = ;

    std::string size = checkout::status(totalCents);

    std::cout << "totalCents=" << totalCents << std::endl;
    std::cout << "status=" << size << std::endl;
    return 0;
}

qualified name A qualified name includes the namespace, `::`, and the name to use.