Chapter 8, Problem 7PP

(a)

Program Plan Intro

Program Plan: 

• filename, population, totalCity, cityName, andmayor variables are used in the program.
• c_str () andclose() functions are used in the program.

Program Description: The main purpose of the program is to create a file to store the collected information about the cities in your state. Prompt the user to enter the data of the each city’s name, their pollution, and the name of the mayor. Store the user-entered data in the file.

(b)

Program Plan Intro

Program Plan: 

• filename, line, andcityInfovariables are used in the program.
• getline (), fail (), c_str(), sort (), push_back (), eof (), close (),andexit () functions are used in the program.

Program Description: The main purpose of the program is to read the data from the file created in the exercise 7a. Sort the data in the alphabetically order by the city name.After sorting, display the data.