Question

Calculate the area of a rectangle.

-          Utilize at least three functions, “Get Input” – “Calculation” – “Show Output”

-          The “Get Input” function must use call-by-reference parameters to gather data

-          The program must ask the user if they would like to run it again

This is a C++ Project using call by reference. If possible please make it as simple as possible as i'm already very confused the way it is.

Answer 1

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Here a new C++ program with name "main.cpp" is created, which contains following code.

main.cpp :

//c++ program to calculate area of rectangle
#include <iostream> //header files
using namespace std;
//function prototype
void GetInput(int &l,int &b);
double Calculation(int l,int b);
void ShowOutput(int l,int b,double area);
int main() //main method
{
//declaring variables
int l,b;
double area;
char choice;//variable used to store user choice
bool flag=true;//variable to store user choice
while(flag){
//calling function to take input from user
GetInput(l,b);
area=Calculation(l,b);//calling funtion to calculate area
ShowOutput(l,b,area);//calling function to print area
//asking user his choice
cout<<"Would like to run it again (y/n): ";
cin>>choice;//reading choice
//checking choice
if(choice=='n')
{
flag=false;//set flag to false to break the loop
}
}
return 0;
}
//function to get input from user
void GetInput(int &l,int &b){
//asking user to enter length
cout<<"Enter Length :";
cin>>l;//reading length
//asking user to enter breadth
cout<<"Enter Breadth :";
cin>>b;//reading breadth   
}
//function to calculate area of rectangle
double Calculation(int l,int b){
return l*b;//return area of rectangle
}
//function to show area
void ShowOutput(int l,int b,double area){
//show area
cout<<"Area of rectangle with length "<<l<<" and breadth "<<b<<" is "<<area<<endl;
}

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Output : Compile and Run above program to get the screen as shown below

Screen 1 :main.cpp

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.