Question

IN C++

You are to write a program which will get the following variables from the user.

Length, Width, Height, Radius, Base.

You should also have variables for Pi as 3.14 and choice1 and choice2.

Your program will first ask the following:

Press 1 to calculate Area

Press 2 to calculate Perimeter

The choice will be saved in choice1.

You should then ask another choice:

Press 1 for Rectangle

Press 2 for Triangle

Press 3 for Circle

You have all the data required to calculate these except the Perimeter of the triangle. Only in this case will you ask the user to input lengths of side1, side2 and side3.

**You can do the shapes first and then the area/perimeter if you prefer**

Display the data neatly to the user.

Answer 1

Giving the code assuming that we have to input (length, width, height, base and radius) all at the same time. As it is not clearly mentioned in the question. You can change this thing easily. Or ask in comment for any change regarding this

Used switch case to manage first choice so that will make code more clean and understandable.

Below is the complete code:

#include <iostream>

using namespace std;

int main() {

float length, width, height, radius, base;

float pi = 3.14;

int choice1, choice2;

cout<<"Enter Length:";

cin>>length;

cout<<"\nEnter Width:";

cin>>width;

cout<<"\nEnter Height:";

cin>>height;

cout<<"\nEnter Radius:";

cin>>radius;

cout<<"\nEnter Base:";

cin>>base;

cout<<"\n1. Press 1 to calculate Area \n2. Press 2 to calculate Perimeter"<<endl;

cout<<"choice1: ";cin >> choice1;

cout<<"\nPress 1 for Rectangle\nPress 2 for Triangle\nPress 3 for Circle"<<endl;

cout<<"choice2: ";cin>>choice2;

switch(choice1){

case 1: {

if(choice2 == 1){

cout << "\nArea of Rectangle is: " << (length*width)<<endl;

}

else if(choice2 == 2){

cout<<"\nArea of Traingle is: " << (0.5*height*base)<<endl;

}

else if(choice2 == 3){

cout << "\nArea of Circle is: " << (pi * radius * radius)<<endl;

}

else{

cout<<"\nChoice other than 1 2 or 3 i.e. Rectangle Triangle or Circle. Quiting !!!";

break;

}

break;

}

case 2:{

if (choice2 == 1){

cout<< "\nPerimeter of Rectangle is: " << (length+width)<<endl;

}

else if (choice2 == 2){

float side1,side2,side3;

cout << "\nEnter side1 of triangle:"; cin>>side1;

cout << "Enter side2 of triangle:"; cin>>side2;

cout << "Enter side3 of triangle:"; cin>>side3;

cout << "\nPerimeter of Triangle is: " << (side1+side2+side3)<<endl;

}

else if(choice2 == 3){

cout<< "\nPerimeter of Circle is: " << (2*pi*radius)<<endl;

}

else{

cout<<"\nInvalid choice2. Quiting !!";

break;

}

break;

}

default: {

cout<<"\nChoice other than 1 or 2 i.e. Area or Perimeter. Quiting !!!"<<endl;

break;

}

}

}