Question

Write a program 'Rectangle-Area.c' that inputs the length and width of a rectangle and outputs its area. The program consists of two functions: the main function and a function that computes and returns the area of a rectangle. The output of the program should be in the main program, not in the function.

     Sample Input: 5 8   Sample Output: The area of a 5 by 8 rectangle is 40.

Answer 1

Program code to copy:-

/*Program inputs the length and width of a rectangle and
outputs its area.
This program consists of two functions:
- main() function which takes length and width as input from
user and calls computeArea() function by passing length and
   width as parameter
- a computeArea() function computes and returns the
area of a rectangle.
*/
#include <stdio.h>

/*Function prototype*/
int computeArea(int l, int w);

int main()
{
   int length, width, area;
  
   /*Prompt the user to input length and width of rectangle*/
   printf("Enter the length of rectangle: ");
   scanf("%d", &length);
   printf("\nEnter the width of rectangle: ");
   scanf("%d", &width);
  
   /*Calling function to computer area by passing length and
   width as parameter*/
   area = computeArea(length, width);
  
   printf("\nThe area of a %d by %d rectangle is %d\n", length, width, area);
}

/*Function computes and returns the area of a rectangle and
receives two int type parameter */
int computeArea(int l, int w)
{
   /*Calculate area of rectangle*/
   int area = l * w;
   /*Returns area to main() function*/
   return area;
}

Screenshot of output:-