Grading Program

[Kovs95]

I began learning how to code this month and attended a c++ camp for a week, so I am familiar with all of the basics. I found these exercises, which I found very helpful. Could one look over my grading program because whenever I start debugging the program, it asks me to imput my grade, but after I type 80 for example and press enter, the program dissapears?

I used a bunch of "if statements" and depending on the value of "int grade" the "char letter_grade" changes.

// Grading Program (1).cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>

using namespace std;

int grade; //Number grade that the user imputs
char letter_grade; //Letter grade that the user receives


int _tmain(int argc, _TCHAR* argv[])
{
	cout << "Please enter your grade!\n";
	cin >> grade; //Receive grade from user
	if(grade == 100)
	{
		cout << "You received a perfect score! Good Work!\n";
	}
	if(grade >= 90 && grade <= 100)
	{
		letter_grade = 'A';
		cout << "You received an: " << letter_grade << endl;
	}
	if(grade >= 80 && grade <= 89)
	{
		letter_grade = 'B';
		cout << "You received an: " << letter_grade << endl;
	}
	if(grade >= 70 && grade <= 79)
	{
		letter_grade = 'C';
		cout << "You received an: " << letter_grade << endl;
	}
	if(grade >= 60 && grade <= 69)
	{
		letter_grade = 'D';
		cout << "You received an: " << letter_grade << endl;
	}
	if(grade == 0 && grade <= 59)
	{
		letter_grade = 'F';
		cout << "You received an: " << letter_grade << endl;
	}

	return (0);
}

[Volatile Pulse]

You have two options, you can either run your code from the command line (Command Prompt for Windows) or you can add a way to "pause" the code at the end so it doesn't just flash away. Most people opt for the later simply because people hate the command line.

Simple add cin.ignore(); and the code will wait for you to hit a button. If one doesn't work, two might. If you want to read up on why this happens, here is a very long thread that explains all of the different options:
http://www.cplusplus.com/forum/beginner/1988/
Please don't use system()

The best option suggested so far has been Duoas' article, here: http://www.cplusplus.com/articles/iw6AC542/

If you're not much of a reader, I'd start with the link to Duoas' article. It explains just about everything you need.

[Kovs95]

Thanks for the reply! How do you run the code from the command line (Command prompt window)? Adding the cin.ignore(); didn't work. Are you supposed to add that line anywhere or after each "if statement".

[Akshit]

options

1)open program from project folder\debug\programname
2)use system("pause") if you are beginner and on windows to hold screen
3)

std::cin.ignore();    //conditional if you are inputting anything before this anywhere
//you can use flush function too and is better one
std::cout<<"Press any key to End program.....";
std::cin.get();

4)using conio.h function getch();
5)Best one

class Close
{
public:
~Close()
{
std::cout<<std::endl<<"Press any key to end program";
std::cin.get();             //can use some more methods here
}
};
int main()
{
Close C;
//code here
return 0;
}

[Kovs95]

Thanks a lot Akshit and Volatile Pulse for your suggestions! I got it to work (: