multiple files program in C++

[csripriya1]

Hi I am having trouble in programming using multiple files in C++.
I have a class declaration in a header file like this.
class test
{
private:
data;
public:
void testfunc();
}

I included this header in a source file, which gives the definition for those functions in the class in header file.

#include "blahblah.h"

void test::testfunc()
{
.......
}

I am calling a function of this class from main . So, I included this header file in main too.

#include <iostream.h>
#include &quot;blahblah.h&quot;

void main()
{
test justfortest;
.............


justfortest.testfunc();

}
When I am trying to compile this , compiler complains about the functions being declared twice.can anyone pl help me with this.
Thanks for your time.

 

[chipperMDW]

Add include guards to the header.

#ifndef FILENAME
#define FILENAME

// class definition

#endif

 

[Seraphic78]

As suggested by chipper, go for include guards. They will prevent the double inclusion of the those files. It's because once a header gets included, #define values are set true, so they aren't included the second time when they are looked for.