Question

Design a program that uses Nested loops to collect data and calculate the average rainfall over a period of years. The program should first ask for the numbers of years. The outer loop will iterate once for each year. The inner loop will iterate twelve times, once for each month. After all iterations, the program should display the number of months, the total inches of rainfall, and the average rainfall per month for the entire period.

Answer 1

// C++ program to collect data using nested loops and calculate the average rainfall over a period of years

#include <iostream>

using namespace std;

int main() {

       int years;

       double rainfall, total_rainfall = 0;

       // input of number of years

       cout<<"Enter the number of years : ";

       cin>>years;

       // nested loops to input data of rainfall for the years

       for(int i=1;i<=years;i++)

       {

             for(int j=1;j<=12;j++)

             {

                    cout<<"Enter inches of rainfall for year-"<<i<<" month-"<<j<<" : ";

                    cin>>rainfall;

                    total_rainfall += rainfall; //calculate the total rainfall

             }

       }

       // output

       cout<<"\nNumber of months :"<<(years*12)<<endl; // number of months

       cout<<"Total inches of rainfall : "<<total_rainfall<<endl; // total inches of rainfall

       cout<<"Average rainfall per month for the entire period : "<<(total_rainfall/(years*12))<<endl; // average rainfall per month for the entire period.

       return 0;

}

//end of program

Output: