how to use bool as return type of function? Tried a simple program But Have no idea at all how to deal with it...

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1.00/5 (1 vote)

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C#

#include<iostream.h>
#include<stdbool.h>  //error in including header file
#include<conio.h>

bool cmp(int,int);  //Declaration error

void main()
{

int a=0,b=1;

cmp(a,b);

getch();

}

bool cmp(int a,int b)  //bool is intialized more than once
{

if(a==b)
return true;
else
return false;

}

Posted 11-Oct-13 5:47am

kashiiii

Updated 11-Oct-13 5:53am

v3

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Thomas Daniels 11-Oct-13 11:52am

Which errors do you get?

kashiiii 11-Oct-13 11:54am

i have updated the question see again,i mention them

Thomas Daniels 11-Oct-13 11:58am

Which compiler do you use?

kashiiii 11-Oct-13 12:07pm

turbo c++

2 solutions

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**Captain Price** · Answer 1 · 2013-10-11T06:27:00

Solution 1

There're is no syntax error in your code snippet. Obviously, the problem is with the compiler. Here it is said that older compilers may not support <stdbool.h></stdbool.h>.

And Turbo C++ ? Really ? You should install a new C++ compiler immediately (Try; CodeBlocks, VC++...). Here're the reasons not to use Turbo C++.

Posted 11-Oct-13 6:27am

Captain Price

Comments

kashiiii 22-Oct-13 12:16pm

I dont Know how to work with other compilers,like code blocks i gave my everything but still cant even execute a simple program in it..it need to be configured properly before first use

Captain Price 22-Oct-13 12:27pm

See http://www.youtube.com/watch?v=tvC1WCdV1XU&list=PLAE85DE8440AA6B83

Richard MacCutchan · Answer 2 · 2013-10-11T21:54:00

Solution 2

Your call to cmp throws away the result, it should be:

C++

void main()
{
    int a=0;
    int b=1;
    bool result;
     
    result = cmp(a,b);
    if (result)
    {
        // the result is TRUE, do something useful
    }
    else
    {
        // the result is FALSE, do something else
    }
         
    getch();
     
}

Posted 11-Oct-13 21:54pm

Richard MacCutchan

Comments

Captain Price 12-Oct-13 9:50am

This is really weird. What's wrong with not assigning result to cmp(a, b) and just ignoring the return value of cmp(a,b) ?

Richard MacCutchan 12-Oct-13 11:02am

Read the question.

Captain Price 12-Oct-13 11:40am

But your answer doesn't clarify the declaration problem.

Richard MacCutchan 12-Oct-13 11:55am

I don't have turbo C so I cannot clear the errors. Question was about how to use the return value.

kashiiii 22-Oct-13 12:13pm

I wrote as you told but still compiler give errors:
1:Unable to include stdbool.h
2:declaration error in cmp
3:undefined symbol result

Richard MacCutchan 22-Oct-13 12:26pm

Where does the file stdbool.h come from? Check that it is in one of the directories in your INCLUDE path. You will also need a declaration of the cmp function.

kashiiii 1-Nov-13 21:50pm

well thanks ,and will you please give me a link of any other compiler that is easy to work with,i have installed code blocks and visual c++, but i cant run any program,i am using windows xp

Richard MacCutchan 2-Nov-13 5:40am

I use Visual C++ and it works fine. I can only assume that you are doing something wrong, but you need to provide us with proper details if you want help.

kashiiii 2-Nov-13 11:35am

Any Link Of working vc++ for xp ??

Richard MacCutchan 2-Nov-13 11:55am

What do you mean by that? There are thousands of working programs all over the world that were created with Visual C++ and run on Windows XP. If you have a problem with some code then either provide the full and exact details of the problem, or use your debugger to diagnose it.

kashiiii 2-Nov-13 22:55pm

I mean i dont know how to configure it,i know it works but the one i had is not working

Richard MacCutchan 3-Nov-13 3:10am

There is nothing to configure. Just install it and it's ready to go.