c program return statement returns more than one value

This program makes a contrasting concept that how a return statement
can return more than one value. Usually in C programming we make a call by value.
This means that in general you cannot alter the actual arguments. But if
desired, it can always be achieved through a call by reference.
Using a call by reference intelligently we can make a function
return more than one value at a time, which is not possible
ordinarily. This is shown in the program given below.

#include<stdio.h>
#include<conio.h>

int areaperi ( int r, float *a, float *p )
{
*a = 3.14 * r * r ;
*p = 2 * 3.14 * r ;
return (0);
}

int main( )
{
int radius ;
float area, perimeter ;
printf ( "\nEnter radius of a circle " ) ;
scanf ( "%d", &radius ) ;
areaperi ( radius, &area, &perimeter ) ;
printf ( "Area = %f", area ) ;
printf ( "\nPerimeter = %f", perimeter ) ;
getch();
}

Output :

C porgram to return more than one value.

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