C program to find area and perimeter using function

#include<stdio.h>

int area(int l,int w)

{

     int ar;

     ar=l*w;

     return ar;

}

int perimeter(int l,int w)

{

     int p;

     p=2*(l+w);

     return p;

}

int main()

{

     int a,b,d,e;

     printf("Enter Length of Rectangle : ");

     scanf("%d",&a);

     printf("\nEnter breadth of Rectangle : ");

     scanf("%d",&b);

     d=area(a,b); // calling function rect_area

     e=perimeter(a,b); // calling function perimeter

     printf("\nArea of Rectangle = %d",d);

    printf("\n\nPerimeter of Rectangle = %d",e);

     return 0;

}

Output:

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