Loop Master Program in C++

[-LeetGamer-]

This program will ask you for two numbers and then ask for a loop type. Look at the source code to see how it works:
C++

#include <iostream>
#include <windows.h>
using namespace std;

int main()
{
    int num1, num2, loop;
    cout << "Input the start of your loop: ";
    cin >> num1;
    system("CLS");
    cout << "Input the end of your loop: ";
    cin >> num2;
    system("CLS");
    cout << "Select loop type:\n\n1 - For\n2 - While\n3 - Do\n\n";
    cin >> loop;
    system("CLS");
    if (loop == 1)
    {
        for (num1; num1 < num2 + 1; num1++)
        {
            cout << num1 << "\n";
        }
    }
    else if (loop == 2)
    {
        while (num1 != num2 + 1)
        {
            cout << num1 << "\n";
            num1++;
        }
    }
    else if (loop == 3)
    {
        do
        {
            cout << num1 << "\n";
            num1++;
        } while (num1 != num2 + 1);
    }
    else
    {
        cout << "Invalid selection >: |\n\n";
    }
    system("PAUSE");
    system("CLS");
    return main();
}

UPDATE, C code added:

#include <stdio.h>

int num1, num2, loop;

int main()
{
    printf("Enter the start of your loop: ");
    scanf("%d", &num1);
    system("cls");
    printf("Enter the end of your loop: ");
    scanf("%d", &num2);
    system("cls");
    printf("Select your loop:\n\n1 - For\n2 - While\n3 - Do While\n\n");
    scanf("%d", &loop);
    system("cls");
    if (loop == 1)
    {
        for (num1; num1 < num2 + 1; num1++)
        {
            printf("%d\n", num1);
        }
    }
    else if (loop == 2)
    {
        while (num1 != num2 + 1)
        {
            printf("%d\n", num1);
            num1++;
        }
    }
    else if (loop == 3)
    {
        do
        {
            printf("%d\n", num1);
            num1++;
        } while (num1 != num2 + 1);
    }
    else
    {
        printf("Invalid selection >: |\n\n");
    }
    getch();
    system("cls");
    return main();
}