Another Noob Question

Is it possible to do a case within a case? For example:

Code:

#include <cstdlib>
#include <iostream>

using namespace std;

int main()
{
    int y;
    int x;
    int a;
    int b;
    cout << "Selection:\n";
    cout << "1. Start\n";
    cout << "2. LoL\n";
    cout << "3. Quit\n";
    cout << "Please make your selection: ";
    cin >> y;
switch (y) {
  case 1:
       switch (x) {
              case 1:
                   break;
              case 2:
                   break;
              case 3:
                   break;
              case 4:
                   break;
              default:
                   cout << "Invalid input.\n";
                   break;
                   }
                   
    break;
  case 2:
    cout << "\nWrong Button!\n\n";
    break;
  case 3:
    return 0;
    break;
  default:
    cout << "\nInvalid input.n\n";
  }
    system("PAUSE");
}

I have actual things filled in, in the sub-cases, but it doesn't prompt me with a 2nd selection. It just skips to the "Invalid Input" portion

Edit: Hope I indented it right. Feel free to yell at me if I didn't.

Edit Edit: A simple yes or no would suffice; however, if no a suggested alternative method would be extremely appreciated.

Originally Posted by Nightwarrior

I have actual things filled in, in the sub-cases, but it doesn't prompt me with a 2nd selection. It just skips to the "Invalid Input" portion

Where is x ever initialized? You get something put into y from the user but never x.

Code:

int x;
    int a;
    int b;
    cout << "Selection:\n";
    cout << "1. Start\n";
    cout << "2. LoL\n";
    cout << "3. Quit\n";
    cout << "Please make your selection: ";
    cin >> y;
switch (y) {
  case 1:
       switch (x) {

I have the:

Code:

int y;
int x;
int a;
int b;

Code:

switch (x) {

Was in my OP as well. Doesn't let me do a 2nd input though.

(BTW, if I'm completely missing your point, feel free to slap me. )

I think you are missing his point.

Your switch case x will always execute your defualt label; because the value of x was never defined, it's normally automaticly zero, and as you can see, you have no case 0: in that switch.

Originally Posted by Yarin

I think you are missing his point.

Your switch case x will always execute your defualt label; because the value of x was never defined, it's normally automaticly zero, and as you can see, you have no case 0: in that switch.

Ah. I understand now. Thanks!

Hrm, what if I wanted to output 2 numbers divided by each other? Like real division. 5 / 2 = 2.5. Dev C++ says 5 / 2 = 2.

It's only doing how many times the number can go in it wholey, and I'd like decimals.

I'm using

Code:

cout << a / b << "\n";

type int only allows whole numbers, eg ...,-3,-2,-1,0,1,2,3,... you will want to use float or double:

Code:

double math;
math = 5/2;

cout << math;

Output is: 2.5

Thanks a lot!

One last question. Is it possible for it to loop back to the start?

i.e.

Switch y case 1 starts the program
switch x case 1 does division

it stops after you do the division. Can you make it go back to the start of switch x so you could do a 2nd problem with it? Something along the lines of:

Code:

cout << "Would you like to do another problem?";

Thanks in advance.

Guess it'd help if I included the code.

Code:

#include <cstdlib> 
#include <iostream> 

using namespace std; 

int main() 
{ 
    int y; 
    int x; 
    double a; 
    double b; 
    cout << "Selection:\n"; 
    cout << "1. Start\n"; 
    cout << "2. LoL\n"; 
    cout << "3. Quit\n"; 
    cout << "Please make your selection: "; 
    cin >> y; 
switch (y) { 
  case 1: 
       cout << "***NOTE*** Only actions with 2 numbers total is supported. Format will be a + b; a - b; a / b; a * b;\n"; 
       cout << "Selection:\n"; 
       cout << "1. Addition\n"; 
       cout << "2. Substraction\n"; 
       cout << "3. Division\n"; 
       cout << "4. Multiplication\n"; 
       cout << "Please choose your action: "; 
       cin >> x; 
       switch (x) { 
              case 1: 
                   cout << "Please enter your first number: "; 
                   cin >> a; 
                   cout << "Please enter your second number: "; 
                   cin >> b; 
                   cout << "\n"; 
                   cout << a + b << "\n";
                   break; 
              case 2: 
                   cout << "Please enter your first number: "; 
                   cin >> a; 
                   cout << "Please enter your second number: "; 
                   cin >> b; 
                   cout << "\n"; 
                   cout << a - b << "\n"; 
                   break; 
              case 3: 
                   cout << "Please enter your first number: "; 
                   cin >> a; 
                   cout << "Please enter your second number: "; 
                   cin >> b; 
                   cout << "\n"; 
                   cout << a / b << "\n"; 
                   break; 
              case 4: 
                   cout << "Please enter your first number: "; 
                   cin >> a; 
                   cout << "Please enter your second number: "; 
                   cin >> b; 
                   cout << "\n"; 
                   cout << a * b << "\n"; 
                   break; 
              default: 
                   cout << "Invalid input!\n"; 
                   break; 
                   } 
                    
    break; 
  case 2: 
    cout << "\nWrong Button! =)\n\n"; 
    break; 
  case 3: 
    return 0; 
    break; 
  default: 
    cout << "\nInvalid input!\n\n"; 
  } 
    system("PAUSE"); 
}

This is a bit sloppy because the tabs are all messed up so it may not have everything on the right line, but I think this is what you want.

Code:

#include <cstdlib> 
#include <iostream> 

using namespace std; 

int main() 
{
    int input = 0;
    int y; 
    int x; 
    double a; 
    double b;
    while ( input == 0 ) {
    cout << "Selection:\n"; 
    cout << "1. Start\n"; 
    cout << "2. LoL\n"; 
    cout << "3. Quit\n"; 
    cout << "Please make your selection: "; 
    cin >> y;
switch (y) { 
  case 1: 
       cout << "***NOTE*** Only actions with 2 numbers total is supported. Format will be a + b; a - b; a / b; a * b;\n"; 
       cout << "Selection:\n"; 
       cout << "1. Addition\n"; 
       cout << "2. Substraction\n"; 
       cout << "3. Division\n"; 
       cout << "4. Multiplication\n"; 
       cout << "Please choose your action: "; 
       cin >> x; 
       switch (x) { 
              case 1: 
                   cout << "Please enter your first number: "; 
                   cin >> a; 
                   cout << "Please enter your second number: "; 
                   cin >> b; 
                   cout << "\n"; 
                   cout << a + b << "\n";
                   break; 
              case 2: 
                   cout << "Please enter your first number: "; 
                   cin >> a; 
                   cout << "Please enter your second number: "; 
                   cin >> b; 
                   cout << "\n"; 
                   cout << a - b << "\n"; 
                   break; 
              case 3: 
                   cout << "Please enter your first number: "; 
                   cin >> a; 
                   cout << "Please enter your second number: "; 
                   cin >> b; 
                   cout << "\n"; 
                   cout << a / b << "\n"; 
                   break; 
              case 4: 
                   cout << "Please enter your first number: "; 
                   cin >> a; 
                   cout << "Please enter your second number: "; 
                   cin >> b; 
                   cout << "\n"; 
                   cout << a * b << "\n"; 
                   break; 
              default: 
                   cout << "Invalid input!\n"; 
                   break; 
                   } 
                    
    break; 
  case 2: 
    cout << "\nWrong Button! =)\n\n"; 
    break; 
  case 3: 
    return 0;
    input = 1;
    break; 
  default: 
    cout << "\nInvalid input!\n\n"; 
  } 
  }
    system("PAUSE"); 
}