Question

Write a C++ program to compute the total volume of N cones, where N is a number entered by the user. Repeat the request for N until the user enters a positive number.

For each cone, ask for the radius and height, compute the volume, and add that volume to the total. Each time you ask the user to enter either the height or the radius, if the user does not enter a positive number, display an error message and ask them again until they enter a positive number. (If either dimension is not positive, then do not compute the volume and do not count that as one of the N cones. Allow the user to enter positive dimensions for N cones.) Display the final total volume (and do not display the cumulative total after each cone).

The volume of a cone is: v = (1/3)PI*r^2*h

where ...
v = volume (in cubic inches)
r = radius (in inches)
h = height (in inches)
PI (use 3.14159)

Program:

Follow proper coding standards. (For simplicity of the assignment, you may assume that the user enters a number and not a letter, and an integer for the number of cones.)

Start early and get the program working one piece at a time. For example, start by getting the result for one cone. Then compute the result for multiple cones. Then add the code to check for invalid inputs.

One more implementation requirement: write a subprogram to compute the volume of one cone.

Turn in your well documented source code.

Answer 1

Code:

#include<iostream>
using namespace std;
int main(){
   int n,i;
   cout<<"Enter the number of cones:";
   cin>>n;
   while(1){
       if(n<0){
           cout<<"invalid,not be negative"<<endl;
           cout<<"Enter the number of cones:";
           cin>>n;
       }
       if(n>=0){
           break;
       }
   }
   float radius,height,pi=3.14159,total=0,vol;
   for(i=0;i<n;i++){
       cout<<"Enter height of cone"<<i+1<<" in inches:";
       cin>>height;
       while(1){
           if(height<=0){
               cout<<"invalid,height be greater than 0"<<endl;
               cout<<"Enter the height of cone"<<i+1<<" in inches:";
               cin>>height;
           }
           if(height>0){
               break;
           }
       }
       cout<<"Enter radius of cone"<<i+1<<" in inches:";
       cin>>radius;
       while(1){
           if(radius<=0){
               cout<<"invalid,radius be greater than 0"<<endl;
               cout<<"Enter the radius of cone"<<i+1<<" in inches:";
               cin>>height;
           }
           if(radius>0){
               break;
           }
       }
       vol=pi*radius*radius*height;
       vol=vol/3;
       total=total+vol;
   }
   cout<<"Total volume is "<<total<<" cubic inches"<<endl;
  
}

Output: