My First If Code, Question? :P

Well I was goofing around in C++ today and I made my first IF code.

Code:

---

#include <iostream>

int main()
{
    std::cout << "Please Enter 1 or 2: ";
   
    int a;
    std::cin >> a;
    std::cin.ignore();
   
    if (a == 1)
    {
          std::cout << "You Typed: 1";
    }
   
    if (a == 2)
    {
          std::cout << "You Typed: 2";
    }
   
    if (a > 2)
    {
        std::cout << "You Didn't Type 1 or 2!";
    }
   
    if (a < 1)
    {
        std::cout << "You Didn't Type 1 or 2!";
    }
   
    std::cin.get();
    return 0;
}

---

What it's supposed to do is see if you typed 1 or 2 and if you didn't it would tell you so. I wan'ted to know how to restart it all from the start if they didn't type 1 or 2? Can anyone give me some info on how I would go about doing that?

In Visual Basic the IF things where a lot easier for me,


(Sub)
If Blah = Blah Then
(Statement)
End If
(Or ElseIf or Else)
End Sub

In someways the C++ seems faster to me, but really its all the same in code so far for me, since in VB the sub parts are typed for you. :) Just need to get use to the "{" "}" and the "( )" things in C++.

Thanks!

Loops
http://www.cprogramming.com/tutorial/lesson3.html

yeah, you could put everything into an infinite loop, i do this often. take a look:

Code:

---

#include <iostream>

using namespace std;  //so you dont haave to always type std::(cout/cin)

int main()
{
    while(1)    //This is a while() loop, it runs what is in the {}
                //until its condition () is false or it is terminated,
                //while(1) is always true, we call this an infinite loop.
    {
        cout << "Please Enter 1 or 2(Type 0 to Exit): ";
       
        int a;
        cin >> a;
        cin.ignore();
       
        if (a == 1)
        {
            cout << "You Typed: 1";
            cin.ignore();      //pauses
            continue;          //this will continue the loop
        }
       
        if (a == 2)
        {
            cout << "You Typed: 2";
            cin.ignore();
            continue;
        }
       
        //i added the exit option in, a while loop like this will go on forever
        if(a==0)
        {
            cout<<"Press Enter to Exit...";
            cin.ignore();
            break;    //break does as it implies, breaks a loop
        }
           
        if (a > 2)
        {
            cout << "You Didn't Type 1 or 2!";
            cin.ignore();
            continue;
        }
       
        if (a < 1)
        {
            cout << "You Didn't Type 1 or 2!";
            cin.ignore();
            continue;
        }
       
    }   
    cin.get();
    return 0;
}

---

Good Luck!

PS-Try to type in 1.5 or 1.2 What happens? Nothing! You could do a couple things here. Heres what i would do, replace:

Code:

---

...
        if (a > 2)
        {
            cout << "You Didn't Type 1 or 2!";
            cin.ignore();
            continue;
        }
       
        if (a < 1)
        {
            cout << "You Didn't Type 1 or 2!";
            cin.ignore();
            continue;
        }
...

---

With:

Code:

---

...
if(a!=1 || a!=2)
{
      cout<<"You didnt type 1 or 2!"
      cin.ignore();
      continue;
}
...

---

The != means doesnt equal, and the || means or.

Good Luck!

Check out the link, there are a couple other kinds of loops.

Alright, thanks your all such a big help! :D