Compile a c++ programm.exe without getting the Error: missing .dll while starting

Question

Im new to c++, I just have some experience in coding with java. So my problem: My Programm compiles and works no problem in the IDE(CLion), but when i try to launch the compiled .exe outside of lion I get "missing dll (stdc++-6.dll) error. I tryd to downloade it, but then I get some other error, that gives no hint.

My Code(its only for training):

#include <iostream> // ausgabe

using namespace std;
int main() {

double num1,num2;
char operation,temp;
bool exit= false;

while (!exit) {

    cout << "\n\n\nGib die Erste Zahl ein:";
    cin >> num1;
    cout << "Gib die zweite Zahl ein:";
    cin >> num2;

    cout << "Gebe eine der Rechenoparationen an (+,-,*,/):";
    cin >> operation;

    switch (operation) {
        case '+':
            cout << num1 << " + " << num2 << " = " << num1 + num2 << endl;
            break;
        case '-':
            cout << num1 << " - " << num2 << " = " << num1 - num2 << endl;
            break;
        case '*':
            cout << num1 << " * " << num2 << " = " << num1 * num2 << endl;
            break;
        case '/':
            cout << num1 << " / " << num2 << " = " << num1 / num2 << endl ;
            break;
        default:
            cout << "Ungültiger Operator gewählt" << endl;
            break;
    }
    cout << "Willst du das Programm beenden? (j/n)";
    cin>> temp;
    if (temp=='j') exit= true;
}

return 0;
}

I´m fighting for the last 3h with this problem. I dont know how to fix it. I try´d to add the include to the CMake.txt, but it diffident worked, it mad nothing.