My code is work but the answer didn't appear.

[Bong2Dy]

#include<iostream.h>
//#include<process.h>
#define Max 10
class Binary{
        int data[Max];
        int top;
    public:
        int empty(){top=-1;return -1;}
        int full();
        void push(int);
        int pop(int);
};
int Binary::full(){
    if(top==Max-1)
        return 1;
    else
        return 0;
}
void Binary::push(int num){
    top=top+1;
    data[top]=num;
}
int Binary::pop(int num){
    num=data[top];
    top=top-1;
    return num;
}
void main(){
    Binary ptr;
    int num;
    ptr.empty();
    cout<<"Input Number : ";cin>>num;
    while(num!=0){
        if(!ptr.full()){
            ptr.push(num%2);
            num=num/2;
            }
        else{
            cout<<"Full";
            break;
            }
        }
    cout<<"In Binary : ";
    while(!ptr.empty()){
        num=ptr.pop(num);
        cout<<num;
        }
}

[weaknessforcats]

Your program is reaching the end of main() and there is nothing there to stop it so it goes away.

Add a statement at the end of main to enter a character. That will stop the program until you press the enter key . Now you have time to see what was displayed.

[Bong2Dy]

Example I input 10 and my output is :

Input Number : 10
In Binary :

// It didn't show answer in Binary

[weaknessforcats]

Your code is not working.

At the end of main() there is:

    cout << "In Binary : ";
    while (!ptr.empty()){
        num = ptr.pop(num);
        cout << num;
    }

but ptr.empty() always returns -1 and that causes an exit of the loop.

Beyond that, the ptr.data, for 10, contains 0101 and some garbage values. 0101 is not 10. It's 5.

I found this out in a couple of minutes using the debugger that comes with my compiler. At this point, I would learn how to use your debugger so you can step through the code and see what's going on. The debugger will let you see the contents of all your variables as you go aong.