Looping problem

slyslick · #1 11-Mar-2009, 08:05

Hello everyone. I received some greatly appreciated help here before and now I am stuck and have another issue that I'm hoping someone will be able to help me with. I'm writing a simple integer calculator that supports addition, subtraction, multiplication, modulus, and division. I have to implement this by defining a class. The program is suppose to 1. request and accept a number, 2. apply the stored operation (of which the first is addition and after it should be whatever the user enters), 3. request and accept the next operation. When the operation entered is '=', the result should be printed and the accumulator reset, when '!' is entered as the operator, the same should happen except the program should now terminate.

Here is a sample run of what I'm trying to accomplish

Code:

Welcome to the calculator
------
Input: 10
Operation: *
Input: 2
Operation +
Input: -5
Operation: =
Result: 15
------
Input: 12
Operation: /
Input: 0
**Division by zero - start over
------
Input: 12
Operation: >
**Invalid operation - ignored
Operation: /
Input: 5
Operation: =
Result: 2
------
Input: 10
Operation: %
Input: 6
Operation: *
Input: 3
Operation: !
Result: 12
------
Calculator Off!

The issue I am having is when I run the program, the while loop is not continuing as it should and exits right away without op being '='. I have attached the files with the code I have so far because I didn't want to make this post any longer than it already is.

Any help would be greatly appreciated. Also feel free to make any comments on anything else I could improve on.

fakepoo · #2 11-Mar-2009, 12:30

The very first thing I saw was

CPP / C++ / C Code:

//while (!(op = '!')); //while op is not '!' keep going

// The above should use == instead of = like
//while (!(op == '!'));  which could be simplified to
//while( op != '!' ); ,but then you need to eliminate the ; so:

while( op != '!' )
{
  // do stuff here
}

slyslick · #3 24-Mar-2009, 17:33

I know it has been a long time but I just want to say thank you for your help

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Looping problem

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Re: Looping problem