4.The length & breadth of a rectangle and radius of a Circle are input through the keyboard. Write a program to calculate the area & perimeter of the rectangle, and the area & circumference of the circle.

 #include<stdio.h>

int main()

{

    float l, b, r,ca, cc, ra, rp;

    printf("Enter the length of rectangle: ");

    scanf("%f", &l);

    printf("Enter the breadth of rectangle: ");

    scanf("%f", &b);

    printf("Enter the radius of circle: ");

    scanf("%f", &r);

    ra = l * b; 

    rp = 2 * (l + b); 

    ca = 3.14 * r * r; 

    cc = 2 * 3.14 * r; 

    printf("\nThe area of the rectangle: %f", ra);

    printf("\nThe perimeter of the rectangle: %f", rp);

    printf("\n\nThe area of the circle: %f", ca);

    printf("\nThe circumference of the circle: %f", cc);

    return (0);

}