Hi,

I just to know what code should I use to terminate the program when the user input the character n.
Here is the code I have so far

Gaack, I'm sorry. I accidentally killed your code when I changed this article from a code snippet to a discussion thread. Would you mind posting it again as a reply?

``````#include <iostream>
#include <cmath>
#include <fstream>           //for file I/O

using namespace std;

int main()
{
ofstream outFile;               //file with the results

// Declaration of variables
float a, b, c;
float s;
float Area;

outFile.open("hw1Output.txt");  //Open the output file

while (true)
{
// Prompt and read the lenghts of the sides of a triangle
cout << " Please enter the lengths of the three sides of a triangle " << endl;
cin >> a >> b >> c;

// Computation of the semiperimeter and area of a triangle

s = (a + b + c)/2;
Area = sqrt(s * (s-a) * (s-b) * (s-c));

// Display the input values and the resulting area

cout << " The area of the triangle with sides : " << a << "," << " " << b << "," << " " << "and" << " " << c << " " << "is" << " " << Area << endl;
cout << endl << endl;
outFile << " The area of the triangle with sides : " << a << "," << " " << b << "," << " " << "and" << " " << c << " " << "is" << " " << Area << endl;

cout<<"Do you want to calculate the area of another triangle (y/n)? ";
}

{

cout<<"Have a nice day"<<endl;
}

outFile.close();                //close hw1Output.txt
return 0;

}
``````

As further apology, here's one possible solution:

``````#include <iostream>
#include <cmath>

using namespace std;

int main()
{
float a, b, c;
float s;
float Area;

cout << " Please enter the lengths of the three sides of a triangle " << endl;
cin >> a >> b >> c;

s = (a + b + c)/2;
Area = sqrt(s * (s-a) * (s-b) * (s-c));

cout << " The area of the triangle with sides : " << a << "," << " " << b << "," << " " << "and" << " " << c << " " << "is" << " " << Area << endl;
cout << endl << endl;

cout<<"Do you want to calculate the area of another triangle (y/n)? ";
}

cout<<"Have a nice day"<<endl;

return 0;
}
``````

In your original code the loop was basically infinite, so you need some way to break out of it. The value of `answer` is one option which I used above. Just make sure that `answer` has an appropriate starting value and you're golden.

Also note that the `=` operator is for assignment. It may have been a typo, but confusing `=` and `==` is a very common and often disastrous bug.

Cheers!

deceptikon , thank you very much for your help.

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