CL Unknown Errors

  c++, cl, compiler-errors

I have written a simple code in C++ in VSC and when I compile it cl gives me some errors, even though it compiles it just fine.
The code is:

#include <iostream>

int main()
    //  Print welcome messages to the terminal
    std::cout << "You are a secret agent breaking into a secure server roomn";
    std::cout << "You need to enter the correct codes to continue..." << std::endl;

    //Declare 3 number code
    const int CodeA = 4;
    const int CodeB = 3;
    const int CodeC = 2;

    const int CodeSum = CodeA + CodeB + CodeC;
    const int CodeProduct = CodeA * CodeB * CodeC;

    // Print sum and product to the terminal
    std::cout << std::endl;
    std::cout << "+ There are 3 numbers in the code" << std::endl;
    std::cout << "+ The codes add-up to: " << CodeSum << std::endl;
    std::cout << "+ The code multiply to give: " << CodeProduct << std::endl << std::endl;

    int GuessA, GuessB, GuessC;
    std::cin >> GuessA;
    std::cin >> GuessB;
    std::cin >> GuessC;
    std::cout << "You entered: " << GuessA << GuessB << GuessC << std::endl;

    return 0;

And the error messages I am getting are:

C:Program Files (x86)Microsoft Visual Studio19CommunityVCToolsMSVC.29.30037includeostream(284): warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc

C:Program Files (x86)Microsoft Visual Studio19CommunityVCToolsMSVC.29.30037includeostream(269): note: while compiling class template member function ‘std::basic_ostream<char,std::char_traits> &std::basic_ostream<char,std::char_traits>::operator <<(int)’

triplex.cpp(22): note: see reference to function template instantiation ‘std::basic_ostream<char,std::char_traits> &std::basic_ostream<char,std::char_traits>::operator <<(int)’ being compiled

triplex.cpp(7): note: see reference to class template instantiation ‘std::basic_ostream<char,std::char_traits>’ being compiled

Can someone explain to me what these are?
Thanks in advance!

Source: Windows Questions C++