Calculator v1

[Brainless Control]

Is it possible to do this?

Well it won't compile cause I'm getting only 1 error.

error C2447: '{' : missing function header (old-style formal list?)

Code:

#include <iostream>
using namespace std;
void myfunc();
void myfuncc();
int main()
{
    double a,b;
    int option;

    myfuncc();
    {

    cout << ":::Calculator v1::: \n";
    

    cout << "Enter a Number: \n";
    cin >> a;
    cout << "Enter a Number: \n";
    cin >> b;
    do {
    cout << "1. Multiplication \n";
    cout << "2. Division \n";
    cout << "3. Addition \n";
    cout << "4. Subtraction \n";
    cout << "5. Enter new numbers \n";
    cout << "6. Quit \n";
    do {
    cout << "Enter your choice: ";
    cin >> option;
    } while(option<1 || option>6);
    
    switch (option) {
    case 1:
        cout << "The Result is: " << a*b << '\n';  
        break;
    case 2:
    cout << "The Result is: " << a/b << '\n';
    break;
    case 3:
        cout << "The Result is: " << a+b << '\n';
        break;
    case 4:
        cout << "The Result is: " << a-b << '\n';  
        break;
    case 5:
        myfunc();
        break;
    case 6:
        cout << "Goodbye \n";
        break;
    }
    
    } while(option!=6);
    
    
    return 0;
    }
}

    void myfunc();
{
myfuncc();
}