Summary  
This chapter covers how to define and use nested structs to model hierarchical data types, including initializing embedded structs and accessing their fields.

General domain of usage  
Data modeling


#define CATCH_CONFIG_MAIN
#include <catch2/catch.hpp>

int _testmain();


struct Address {
    std::string city;
};

struct Company {
    Address address;
};

std::string printCompanyCity(Company company);

TEST_CASE("printCompanyCity returns correct string for San Francisco", "[printCompanyCity]") {
    Company c;
    c.address.city = "San Francisco";
    std::string result = printCompanyCity(c);
    REQUIRE(result == "Company city: San Francisco");
}

TEST_CASE("printCompanyCity returns correct string for New York", "[printCompanyCity]") {
    Company c;
    c.address.city = "New York";
    std::string result = printCompanyCity(c);
    REQUIRE(result == "Company city: New York");
}

test.cpp

Master the essentials of C++ structures and enumerations. Learn how to define, use, and combine structs and enums to model real-world data, and practice with hands-on coding tasks.

Explore the basics of structs in C++, including their syntax, initialization, and how they differ from classes.

Delve into more complex struct scenarios, including nesting and arrays.

Discover how enums provide named constants and how to use them effectively.

Challenge: Nested Structs

解答