Pushback elements of other arrays

Question

I created two arrays A and B, the array C should store the first elements of A and B. Ex : A={1,2,3}, B={4,5,6}, C must be {1,4,2,5,3,6}. My program doesn't show anything after the input of my arrays. This is my loop :

for(int i(0);i<3;i++){
        C.push_back(A[i]);
        C.push_back(B[i]);
}

for(int i(0);i<6;i++){
        std::cout << C[i] << " ";
}

Answer 1

Try this:

int main()
{
    std::vector<int> A = {1,2,3};
    std::vector<int> B = {4,5,6};
    std::vector<int> C;
    for (int i(0); i < 3; i++)
    {
        C.push_back(A[i]);
        C.push_back(B[i]);
    }

    for (int i(0); i < 6; i++)
    {
        std::cout << C[i] << " ";
    }

    return 0;
}

Or you can change it to:

int main()
{
    std::vector<int> A(3);
    std::vector<int> B(3);
    for (int i = 0; i < 3; ++i)
    {
        std::cin >> A[i];
    }
    for (int i = 0; i < 3; ++i)
    {
        std::cin >> B[i];
    }
    std::vector<int> C;
    for (int i(0); i < 3; i++)
    {
        C.push_back(A[i]);
        C.push_back(B[i]);
    }

    for (int i(0); i < 6; i++) 
    {
        std::cout << C[i] << " ";
    }

    return 0;
}