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OrbWorks Community Forum • View topic - Basic Calculator

Basic Calculator

Postby visorprismman on Mon Oct 21, 2002 11:21 am

Hi,
I'm trying to make a simple calculator here is the source.
//calc
//by visor man

int x, y, operatorf, result;

main(){
graph_on();
clearg();
x=gets("x value");
y=gets("y value");
operator=gets("operator");
result=(x+operator+y);
}

When I run the program I only get the sum of the two values. I want the user to be able to choose the operator ie. x, -, *, /. I also tried it with if then statements but it did not work. Any suggestions would be appreciated.

Cheers:)



Cheers
Cheers
visorprismman
 
Posts: 26
Joined: Fri Sep 13, 2002 4:27 pm
Location: USA

Postby jstadolnik on Mon Oct 21, 2002 12:56 pm

As in standard C, operators cannot be contained in a variable. If the operator variable contains a non-numerical string it is evaluated to zero for compuatations.

I would suggest using a switch-case construct to decode the operator variable.

switch(operator) {
case "+": result=x+y; break;
case "-": result=x-y; break;
//and so on...
}

Joe

The PToolboxLib guy.
http://www.geocities.com/retro_01775/PToolboxLib.htm
jstadolnik
 
Posts: 1741
Joined: Wed Dec 06, 2000 3:34 am
Location: USA

Postby visorprismman on Mon Oct 21, 2002 1:21 pm

Hey,

Thanks for the reply. How do I implement that? Will the break be implemented in the operator? I mean when I do this code.
operator=gets("Operator");

Would the break make it work? I'll try it. Thanks for replying so fast.



Cheers
Cheers
visorprismman
 
Posts: 26
Joined: Fri Sep 13, 2002 4:27 pm
Location: USA

Postby visorprismman on Mon Oct 21, 2002 1:40 pm

Hey,

It worked thanks...



Cheers
Cheers
visorprismman
 
Posts: 26
Joined: Fri Sep 13, 2002 4:27 pm
Location: USA


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