C Programming - Functions - Discussion

But if we use call by reference method in which original values are passed then a function can return more than 1 value at a time.

e.g.

#include<stdio.h>
void areaperi(int,float *,float *);
void main()
{

int radius;
float area,perimeter;

printf("\nEnter radius of a circle");
scanf("%d",&radius);

areaperi(radius,&area,&perimeter);

printf("\n Area=%f \n Perimeter=%f,area,perimeter");
}

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

Yup @Nitish, you are right. That's what I wanna say. A function can return multiple values by using call by reference. A mixed call containing call by value and call by reference can do it also.

Then what is the answer? They didn't update it.

Can anyone give the correct explanation for this?

It can only return 1 value. We are not directly getting two values by using call by reference, we have nowhere used return statement two times. Therefore function can only return 1 value.

Usually function returns only one value, but using structures we can return more than one value.

We can also return multiple values at the time of return.
Such as return(2,3);

According to me, it is possible to return more than one value in a function by making use of pointers.

Yes, Function can return more than one values at a time. We can do this using pointer. Like *Sum = a;.

@Vinay.

It returns 3 only.
if k=return(2,3)
we will get k=3 only.