switch statement problem

[Poropin]

So, I needed to make a program where you enlarge the digits' 0-9. For some reason, I can't seem to output the larger version of the digit. The program works, it's just that the switch statements aren't compiling.

Here's the code:

#include <iostream>
using namespace std;

void banner();
void choice();
void digit0();
void digit1();
void digit2();
void digit3();
void digit4();
void digit5();
void digit6();
void digit7();
void digit8();
void digit9();

int main()

{
int digit = 9;

	banner();

	choice();

switch (digit)
{

	case 0:
		digit0();
		break;
	case 1:
		digit1();
		break;
	case 2:
		digit2();
		break;
	case 3:
		digit3();
		break;
	case4:
		digit4();
		break;
	case 5:
		digit5();
		break;
	case 6:
		digit6();
		break;
	case 7:
		digit7();
		break;
	case 8:
		digit8();
		break;
	case 9:
		digit9();
		break;

	default: 
		cout << "I haven't figured that out yet" << endl;
		break;
		} 
return 0;
}


void banner()
{
	cout << "Number Magnifier!" << endl;
	cout << "See the number up close, and personal!" << endl;

	cout << "    ********************************************************************   " << endl;
	cout << "    *                                                                 *    " << endl;
	cout << "     *                                                               *     " << endl;
	cout << "      *                         WELCOME!                            *      " << endl;		
	cout << "       *                                                           *       " << endl;
	cout << "      *                                                            *       " << endl;
	cout << "     *                                                              *      " << endl;
	cout << "    *                                                                *     " << endl;
	cout << "    ********************************************************************   " << endl;
}

void choice()
{
	int digit;
	cout << "Enter a digit (0-9) or press X to exit: " << endl;   
	cin >> digit;
	cin.ignore(256, 'endl');
}

void digit0()
{
	cout << "  000  " << endl;
	cout << " 0   0 " << endl;
	cout << " 0   0 " << endl;					// 
	cout << " 0   0 " << endl;
	cout << " 0   0 " << endl;
	cout << " 0   0 " << endl;
	cout << "  000  " << endl;
}
void digit1()
{
	cout << "  1  " << endl;
	cout << "  1  " << endl;
	cout << "  1  " << endl;
	cout << "  1  " << endl;								
	cout << "  1  " << endl;
	cout << "  1  " << endl;
	cout << "  1  " << endl;
	cout << "  1  " << endl;
}
void digit2()
{
	cout << "  222  " << endl;
	cout << " 2   2 " << endl;
	cout << "    2  " << endl;
	cout << "   2   " << endl;								
	cout << "  2    " << endl;
	cout << " 2     " << endl;
	cout << " 22222 " << endl;
}
void digit3()
{
	cout << " 333 " << endl;
	cout << "3   3" << endl;
	cout << "   3 " << endl;
	cout << " 33  " << endl;								
	cout << "   3 " << endl;
	cout << "3   3" << endl;
	cout << " 333 " << endl;
}
void digit4()
{
	cout << "   4   " << endl;
	cout << "  44   " << endl;
	cout << " 4 4   " << endl;
	cout << "444444 " << endl;							
	cout << "   4   " << endl;
	cout << "   4   " << endl;
	cout << "   4   " << endl;
}
void digit5()
{
	cout << " 55555 " << endl;
	cout << " 5     " << endl;
	cout << " 5     " << endl;
	cout << " 5555  " << endl;									        cout << "             5  " << endl;
	cout << "     5 " << endl;
	cout << " 5555  " << endl;
}
void digit6()
{
	cout << "   666 " << endl;
	cout << "  6    " << endl;
	cout << " 6     " << endl;
	cout << " 6666  " << endl;							
	cout << " 6   6 " << endl;
	cout << " 6   6 " << endl;
	cout << "  666  " << endl;
}
void digit7()
{
	cout << " 77777 " << endl;
	cout << "     7" << endl;
	cout << "    7  " << endl;						
	cout << "   7   " << endl;
	cout << "  7    " << endl;
	cout << " 7     " << endl;
}
void digit8()
{
	cout << "  888  " << endl;
	cout << " 8   8 " << endl;
	cout << "  8 8  " << endl;
	cout << "   8   " << endl;							
	cout << "  8 8  " << endl;
	cout << " 8   8 " << endl;
	cout << "  888  " << endl;
}
void digit9()
{
	cout << "  999  " << endl;
	cout << " 9   9 " << endl;
	cout << " 9   9 " << endl;							
	cout << "  9999 " << endl;
	cout << "     9 " << endl;
	cout << "     9 " << endl;
	cout << "  999  " << endl;
	}

[Arslan7041]

Have the choice() function return the digit entered by the user. Catch this return in the variable 'digit' back in main. This is the variable the switch statement will check for.

[Poropin]

what do you mean catch the return back in main? Sorry, I'm fairly new at this.

[Arslan7041]

int choice() // notice return type is no longer void, but int
{
	int digit;
	cout << "Enter a digit (0-9) or press X to exit: " << endl;   
	cin >> digit;
	cin.ignore(256, '\n');
        
        return digit; // return this value back to main
}

in main:

int digit = 9;

	banner();

	digit = choice(); // put return value of choice() into 'digit'

switch (digit)
{
   //....
}

[boost lexical cast]

You can always pass by reference to access digit directly:

choice() function:

// pass digit by reference so here digit is bound to the digit in main
// 
void choice(int &digit)
{
    std::cout <<"Enter a digit (0-9) or press X to exit: ";
    // changes the digit in main directly
    std::cin >> digit;
    std::cin.ignore(256, '\n');
}

main:

int main()
{
    int digit{9};
    banner();
    // pass by reference
    choice(digit);
    switch (digit)
    {
        // .....................
    }
}