Chapter 8, Problem 33RQE

Program Plan Intro

Structure array:

The structure needs an array if the items need to be grouped together.

• Array is a “derived” data type and it contains similar elements.
• The array index starts with 0.
  • If the size of the array is 4, then the index values are “0”, “1”, “2”, and “3”.

Syntax:

struct_name array_name[size];

Example:

Book name[20];

Explanation:

“Book” is a structure name, “name” is an array name, and the value “20” is the “size” of an array.

Algorithm:

Algorithm to define an array of structure to hold 12 records about city population and read the data from the specified file “pop.dat” and store it in structure members.

• Define the structure Population.
  • Declare the structure variables such as city name and its population.
• Declare an array of structure cntry to hold 12 records.
• Define the main function
  • Declare a file stream object.
  • Open the file “pop.dat” using the object.
  • Using for loop,
    • Read city name and its population from the file and store it in structure members.
      • Close the file.