Converting decimal, hexidecimal, octal

[Sam786]

I need this program to be able to convert decimal, hexadecimal and octal, don't know why it does not work. help please.

 #include<iostream>
using namespace std;

const int STACK_SIZE = 100;
class stack {
	private:
		int count;			// number of items in the stack
		int data[STACK_SIZE];
	public:
		stack();
		~stack();
		void push(const int item);	// push an item on the stack
		int pop(void);			// pop item off the stack
	};
stack::stack()	// constructor
{
	count = 0;	// zero the stack
}
stack::~stack() {}	// default destructor
void stack::push(const int item)
{
	if (count < STACK_SIZE)
	{
		data[count] = item;
		++count;
	}
	else cout << "Overflow!\n";
}
int stack::pop(void)
{
	if (count >0)
	{
		--count;
		return (data[count]);
	}
	else
	{
		cout << "Underflow!\n";
		return 0;
	}
}
int menu();
void toBinary();
void toOctal();
void toHex();

int main()
{
		int choice = menu();
		switch(choice)
		{
		case (0):
			toBinary();
			break;
		case (1):
			toOctal();
			break;
		case(2):
			toHex();
			break;
		}
		return 0;
}
int menu()
{
	int choice;
	cout << " *****Menu***** " << endl;
	cout << "Convert the number from decimal into: " << endl;
	cout << "0-Binary" << endl;
	cout << "1-Octal" << endl;
	cout << "2-Hexadecimal" << endl;
	cin >> choice;
	return choice;
}

void toBinary()
{
	int num;
	int total = 0;
	stack reverse; // declare a local stack!!!!!!!!!!!!!!!!!!
	int ctr=0; // declare a local counter!!!!!!!!!!!!!!!
	cout << "Please enter a decimal: ";
	cin >> num;
	cout << "The decimal number " << num << " converts to the binary number: ";
	while(num > 0)
		{
			total = num % 2;
			num /= 2;
			//cout << total << " ";
			reverse.push(total); // save to stack instead of printing!!!!!!!!!
			ctr++; // count the number of digits saved!!!!!!!!!!!!
		}
	while (ctr > 0)
             {
				cout << reverse.pop() << " ";
				ctr--;
	         }
}

void toOctal()
{
	int num;
	int total = 0;
	stack reverse; // declare a local stack!!!!!!!!!!!!!!!!!!
	int ctr=0; // declare a local counter!!!!!!!!!!!!!!!
	cout << "Please enter a decimal: ";
	cin >> num;
	cout << "The decimal number " << num << " converts to the octal number: ";
	while(num > 0)
		{
			total = num % 8;
			num /= 8;
			//cout << total << " ";
			reverse.push(total); // save to stack instead of printing!!!!!!!!!
			ctr++; // count the number of digits saved!!!!!!!!!!!!
		}
	while (ctr > 0)
             {
				cout << reverse.pop() << " ";
				ctr--;
	         }
}
void toHex()
{
	int num,counter,x,a,hex[100];
	//char c[100];
	cout<<"Please enter a decimal: ";
	cin>>num;
	cout<<"\nThe Decimal number "<<num<<" converts to the Hexadecimal number:  ";
	for(counter=0;num!=0;counter++)
		{
			a=num%16;
			hex[counter]=a;
			num=num/16;
			}
	for(x=counter-1;x>=0;x--)
		{
			if(hex[x]==10)
				{
					cout<<"A";
					}
			else if(hex[x]==11)
				{
					cout<<"B";
					}
			else if(hex[x]==12)
				{
					cout<<"C";
					}
			else if(hex[x]==13)
				{
					cout<<"D";
					}
			else if(hex[x]==14)
				{
					cout<<"E";
					}
			else if(hex[x]==15)
				{
					cout<<"F";
					}
			else
				{
					cout<<hex[x];
					}
			}
	}

[keskiverto]

Please describe the "does not work" in more detail. What "wrong" do you observe? Is it:
a) Compile error (List exact error message.)
b) Crash (List input)
c) Unexpected output. (List input, expected output, observed output.)

Why do two cases use a stack, but not the third?


(See also std::oct, std::dec, std::hex and std::bitset)


PS. This is a new (continuation) thread about problem that already had
http://www.cplusplus.com/forum/beginner/188299/
(and some other double-posts)

[jedaiCoder]

Use std::hex, std::oct

#include <iostream>

int main()
{
   //Take input from user
   std::string inp;
   std::cin >> inp;
   
   std::cout << std::endl << std::hex;//Set output format as hexadecimal
   std::cout << inp;
   
  /*std::cout << std::endl << std::bin;//Set output format as binary
   std::cout << inp;*/
   
   std::cout << std::endl << std::oct;//Set output format as octal
   std::cout << inp;
}

Edit: I used to use std::bin earlier but I think it might be wrong or deprecated so I put comments around it but just do some googling and you'll find it