Question

Write a c++ program that asks the user to choose his preferred shape, and asks then for two numbers (positive but not necessary integers) in order to calculate the shape's area.

The possible shapes are: Triangle, Ring and Rectangle. If the user chose a different shape, you

will warn him and wait for a valid shape.

• The area of a circle is πr12-r22 (suppose π= 3.4 ).
• The area of a triangle is base*height/2.
• The area of a rectangle is height*width.

While the user will enter the values in cm , the program will display the number of paint bottles

needed to paint the area of the shape. Each bottle can cover 5cm^2. The number of paint bottles should be an integer value.

Answer 1

Note:

AS THE NUMBER OF BOTTLES MUST BE AN INTEGER,WE WILL TAKE CEIL OF THE ACTUAL ANSWER.

Eg:if numberofbottles=3.4 then we will take

number ofbottles=4 as we have to take integer value

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
cout<<" 1.TRIANGLE\n";
cout<<" 2.RING\n";
cout<<" 3.RECTANGLE\n";
cout<<"CHOOSE ONE OF THE ABOVE SHAPES,ENTER NUMBER ACCORDINGLY:";
int choice;
cin>>choice;
while(choice<1 || choice>3)
{
cout<<"PLEASE MAKE SURE YOU CHOOSE ONE OF THE ABOVE SHAPES ONLY:";
cin>>choice;
}
float a,b,temp;
cout<<"Enter two values a and b:";
cin>>a>>b;
if(a<b)
{
temp=a;a=b;b=temp;
}
float area=0;
if(choice==1)
area=(a*b)/2;
else if(choice==2)
area=3.4*(a*a-b*a);
else
area=a*b;
int bottles=0;
bottles=ceil(area/5);
cout<<"Number of paint bottles requires is :"<<bottles<<"\n";
return 0;
}