simple program problem - need help

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Hello.,
Im learning C online, and one of the examples from the internet is this:

C Syntax (Toggle Plain Text)
#include <stdio.h>
 
int CalcVolume (int length, int width, int height);
 
void PrintIt (int vol);
 
void main()
{	
int volume1, volume2;
int x = 8, y = 15, z = 20;
volume1 = CalcVolume (10, 20, 30);
PrintIt (volume1);
volume2 = CalcVolume (x, y, z);		
PrintIt (volume2);	
}	
 
/* end of main */	
 
int CalcVolume (int length, int width, int height)	
 
{
 
int vol;	
vol = length * width * height;
return vol;	
}
/* end of CalcVolume */
 
void PrintIt (int vol)
{		
printf("The volume is: %d\n", vol);
}
#include <stdio.h>

int CalcVolume (int length, int width, int height);

void PrintIt (int vol);

void main()
{	
int volume1, volume2;
int x = 8, y = 15, z = 20;
volume1 = CalcVolume (10, 20, 30);
PrintIt (volume1);
volume2 = CalcVolume (x, y, z);		
PrintIt (volume2);	
}	

/* end of main */	

int CalcVolume (int length, int width, int height)	

{

int vol;	
vol = length * width * height;
return vol;	
}
/* end of CalcVolume */

void PrintIt (int vol)
{		
printf("The volume is: %d\n", vol);
}

but when im trying to compile it sais

ch5m.c: In function ‘main’:
ch5m.c:9: warning: return type of ‘main’ is not ‘int’

is there an error in the exesize?

Thanx!

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atman

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Nov 9th, 2008

Re: simple program problem - need help

Some C compiler will give you a warning when your main function does not return an integer.

In this case, do the following changes to the main function:

C Syntax (Toggle Plain Text)
int main()
{
......
......
return 0;
}
int main()
{
......
......
return 0;
}

Denniz

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Nov 9th, 2008

Re: simple program problem - need help

you can also use the above statement as
void main()
{
........
.......
.....
getch();
}
since in using the void function you need have to use return anything.

ajay.krish123

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