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

int _testmain();


void doubleArray(int arr[], int size);

TEST_CASE("Array values are doubled for positive integers", "[doubleArray]") {
    int arr[4] = {2, 4, 6, 8};
    doubleArray(arr, 4);
    REQUIRE(arr[0] == 4);
    REQUIRE(arr[1] == 8);
    REQUIRE(arr[2] == 12);
    REQUIRE(arr[3] == 16);
}

TEST_CASE("Array values are doubled for mix of positive and negative integers", "[doubleArray]") {
    int arr[5] = {-1, 0, 3, -7, 5};
    doubleArray(arr, 5);
    REQUIRE(arr[0] == -2);
    REQUIRE(arr[1] == 0);
    REQUIRE(arr[2] == 6);
    REQUIRE(arr[3] == -14);
    REQUIRE(arr[4] == 10);
}

TEST_CASE("Array values are doubled for all zeros", "[doubleArray]") {
    int arr[3] = {0, 0, 0};
    doubleArray(arr, 3);
    REQUIRE(arr[0] == 0);
    REQUIRE(arr[1] == 0);
    REQUIRE(arr[2] == 0);
}

test.cpp

Master arrays in modern C++. Learn how arrays work, how to use them safely, and how to apply them in practical C++ programs. This course guides you from the basics of array declaration to advanced usage, including pitfalls and modern alternatives.

Learn what arrays are, why they exist, and how they fit into C++ programming.

Explore how to access, modify, and safely use array elements.

Apply arrays in practical scenarios: looping, modifying, and passing to functions.

Go beyond basics: multidimensional arrays, common bugs, and modern alternatives.

Challenge: Modify Array Values

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Challenge: Modify Array Values

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