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Write a
There are a variety of ways to deal with the month names. One straightforward method is to code the months as integers and then do a conversion before doing the output. A large switch statement is acceptable in an output function. The month input can be handled in any manner you wish, as long as it is relatively easy and pleasant for the user.
After you have completed the previous program, produce an enhanced version that also outputs a graph showing the average rainfall and the actual rainfall for each of the previous 12 months. The graph should be similar to the one shown in Display 5.4, except that there should be two bar graphs for each month, and they should be labeled as the average rainfall and the rainfall for the most recent month. Your program should ask the user whether he or she wants to see the table or the bar graph, and then should display whichever format is requested. Include a loop that allows the user to see either format as often as the user wishes until the user requests that the program end.
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Program plan:
- Necessary header files are included.
- Four functions table (),barGraph(),barAsterisks(),displayMonth () are declared for various functions and defined inside the main() function
- double actualRainfall[12],double avgRainfall[12], double statusRainfall[12],int currentMonth, char userChoice, int count variables are declared of different data types to store multiple values required in the program.
- For loops are used for various conditions.
- A do-while loop is used to exit from the program.
- A switch statement is used for printing the different month names according the choice of month.
Program Description:
The main purpose of the program is to compare the rainfall of 12 months in a city. Comparison of average monthly rainfall and actual monthly rainfall is shown either in tabular form or with the help of Bar Graph.
Explanation of Solution
Sample Program
/*Header files section*/ #include<iostream> #include<stdlib.h> #include<string> #include <iomanip> using namespace std; //Function declaration void table(double actualRainfall[], double avgRainfall[], double statusRainfall[]); void barGraph(double avgRainfall[], double actualRainfall[], double statusRainfall[]); void barAsterisks(int stars); void displayMonth(int month); //main method int main() { //Declare variables double actualRainfall[12]; double avgRainfall[12]; double statusRainfall[12]; int currentMonth; char userChoice; int count=0; //Prompt and read each month's rainfall //from the user cout << "Enter average monthly " << "rainfalls for each month..." << endl; for (int i = 0; i < 12; i++) { displayMonth(i); cout << ": "; cin >> avgRainfall[i]; } //Prompt and read the current month // and then asks for the rainfall figures //for the previous 12 months cout << "Enter the current month " "(For example: Enter 1 for January) : " << endl; cin >> currentMonth; cout << "Enter the actual rainfall for " " each month in the previous year..." << endl; for (int month = currentMonth - 1; count < 12; month = (month + 1) % 12, count++) { displayMonth(month); cout << ": "; cin >> actualRainfall[month]; } for (int i = 0, j = 0; i < 12; i++, j++) { if (avgRainfall[i] > actualRainfall[i]) statusRainfall[j] = actualRainfall[i] - avgRainfall[i]; else statusRainfall[j] = actualRainfall[i] - avgRainfall[i]; } cout << endl; //do-while loop to see either table or bar do { cout << "Enter your choice(T for table or " " B for bar-graph or E for exit program): "; cin >> userChoice; cout << endl; if (userChoice == 'T' || userChoice == 't') table(actualRainfall, avgRainfall, statusRainfall); else if (userChoice == 'B' || userChoice == 'b') barGraph(avgRainfall, actualRainfall, statusRainfall); else if (userChoice == 'E' || userChoice == 'e') { cout << "Exit the program...Thank you"<<endl; exit(0); } cout << endl; } while (true); return 0; } //Method definition of table void table(double rainfall[], double avgRainfall[], double statusRainfall[]) { cout << endl; cout << "___________________________________________" "______________________________________" << endl; cout << "Month" << setw(20) << "Actual_Rainfall" << setw(20) << "Average_Rainfall "<< setw(25) << " Above_or_Below_Average_Rainfall" << setw(20) << endl; cout << "___________________________________________" "______________________________________" << endl; for (int i = 0; i < 12; i++) { cout.setf(ios_base::left); displayMonth(i); cout << "\t" << setw(20) << rainfall[i] << setw(20) << avgRainfall[i] << setw(20) << statusRainfall[i]; cout << endl; } cout << "_____________________________________________" "____________________________________" << endl; } //Method definition of barGraph void barGraph(double avgRainfall[], double rainfall[], double statusRainfall[]) { cout << "Graph showing the average rainfall " "and the actual rainfall for each of the " "previous 12 months..." << endl; cout << endl; for (int i = 0; i < 12; i++) { displayMonth(i); cout << ":" << "Average_Rainfall" << " "; int n1 = (int)avgRainfall[i]; barAsterisks(n1); cout << endl; displayMonth(i); cout << ":" << "Actual_Rainfall" << " "; int n = (int)rainfall[i]; barAsterisks(n); cout << endl; cout << endl; } } //Method definition of barAsterisks void barAsterisks(int stars) { for (int count = 1; count <= stars; count++) cout << "*"; } //Method definition of displayMonth void displayMonth(int month) { cout.width(8); switch (month) { case 0: cout << "January"; break; case 1: cout << "February"; break; case 2: cout << "March"; break; case 3: cout << "April"; break; case 4: cout << "May"; break; case 5: cout << "June"; break; case 6: cout << "July"; break; case 7: cout << "August"; break; case 8: cout << "September"; break; case 9: cout << "October"; break; case 10: cout << "November"; break; case 11: cout << "December"; break; } }
Explanation:
In the above program, user inputs the average and actual monthly rainfall for the 12 months. After that a comparison is made between the average and actual rainfall of the particular month. Different options are provided to the user to display the comparison of rainfalls of the months either in Tabular form or as Bar Graph. In that option only, user can choose to exit the program by choosing the provided option. In the last according to the choice of user, data is displayed either in Tabular form or as Bar Graph.
Sample Output:
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