#include <iostream>

int main() {
    std::cout << "Hello World!";
    return 0;
}

in python:

print('Hello World!')

in c++:

# include <iostream>
using namespace std;

int main()
{
    char op;
    float num1, num2;

    cout << "Enter operator either + or - or * or /: ";
    cin >> op;

    cout << "Enter two operands: ";
    cin >> num1 >> num2;

    switch(op)
    {
        case '+':
            cout << num1+num2;
            break;

        case '-':
            cout << num1-num2;
            break;

        case '*':
            cout << num1*num2;
            break;

        case '/':
            cout << num1/num2;
            break;

        default:
            cout << "Error! operator is not correct";
            break;
    }

    return 0;
}

in python:

eq = input('Enter your equation > ')
try:
    print(eval(eq))
except:
    print('Invalid syntax')

You can get more done in a shorter amount of time in python.
Also, scratch is slower than C++ and python.