A function returning the area and perimeter of a rectangle.

#include <stdio.h>

void rAreaPeri(float, float, float *, float *);

int main(void)
{
float len, breadth, area, peri;

printf("\nEnter the length and breadth : ");
scanf("%f%f", &len, &breadth);

rAreaPeri(len, breadth, &area, &peri);

printf("\nArea is %f\nPerimeter is %f", area, peri);

return 0;
}

void rAreaPeri(float l, float b, float *ap, float *pp)
{
*ap = l * b;
*pp = 2 * (l + b);
}