ITU_Assignment 0 for debugging

Debug.cpp

// This is a Program of a calculator.It will enter two numbers and a character from user and perform the entered operation.
#include <iostream>
using namespace std;
//This Function will output message on screen.
void OutputMessage()
{
    cout<<"Welcome to Faltu Calculator by Zuraiz, Israr and Munir...!!!"<<endl<<endl
        <<"Enter number 65535 to END program"<<endl<<endl;
}
//It will enter "Number" from user and return that value.
int InputNumber()
{
    int input;
    cout<<"Enter Number: ";
    cin>>input;
    return input;
}
//This function will prompt the user that which operation he would like to perform?
char InputOperation()
{
    //It should return a character
    char operation=0;
    while(1)    // If User enters any character other then ( /, *, -, +, %) it should ask again.
    {
     
        cout<<"Enter Operation ( /, *, -, +, %): ";
        cin>>operation;
        if(operation=='/')
        {
            operation = '/';
            break;
        }
        if(operation=='+')
        {
            break;
        }
        if(operation=='-')
        {
            break;
        }
        if(operation=='*')
        {
            break;
        }
        if(operation=='%')
        {
            break;
        }
        else
            cout<<endl<<"Invalid Input... \nEnter Again Chawal kaheen ke...!!!"<<endl;
    }
    return operation;
}
//It will calculate the answer As it will take all inputs and perform the operation on the both integer inputs
float Calculation(int first_input, int second_input, char operation)
{
    float answer=0;
    switch (operation)
    {
        case '/':
        {
            answer=  (float) first_input/second_input;
            break;

        }
        case '*':
        {
            answer=first_input*second_input;
            break;

        }
        case '+':
        {

            answer=first_input+second_input;
            break;
        }
        case '%':
        {
            answer=first_input % second_input;
            break;

        }
        case '-':
        { answer=first_input-second_input;
            break;

        }
    }
    return answer;
}
//It will output answer on the screen.
void OutputAnswer(float answer)
{

    cout<<endl<<"ANSWER: "<<answer<<endl<<endl;
}
int main()
{
    int first_input;  //first_input will have the first value and also the result
    int second_input;
    char operation;
    OutputMessage();
    first_input= InputNumber();
    operation= InputOperation();
    second_input = InputNumber();

    while(second_input!=65536)
    {
        float  result=Calculation(first_input,second_input,operation);
        OutputAnswer(result);
        first_input = result;
        operation= InputOperation();
        second_input = InputNumber();
    }

    return 0;
}