Chapter 18, Problem 9PC

Program Plan Intro

Rainfall Statistics Modification

Program Plan:

IntList.h:

• Include the required specifications into the program.
• Define a class template named “IntList”.
  • Declare the member variables “value” and “*next” in structure named “ListNode”.
  • Declare the constructor, copy constructor, destructor, and member functions in the class.
• Declare a class template and define a function named “appendNode()” to insert the node at end of the list.
  • Declare the structure pointer variables “newNode” and “dataPtr” for the structure named “ListNode”.
  • Assign the value “num” to the variable “newNode” and assign null to the variable “newNode”.
  • Using “if…else” condition check whether the list is empty or not, if the “head” is empty then make a new node into “head” pointer. Otherwise, make a loop to find last node in the loop.
    • Assign the value of “newNode” into the variable “dataPtr”.
• Declare a class template and define a function named “print()” to print the values in the list.
  • Declare the structure pointer “dataPtr” for the structure named “ListNode”.
  • Initialize the variable “dataPtr” with the “head” pointer.
  • Check whether the list is empty or not; if the list is empty then display the values of the list.
• Declare a class template and define a function named “insertNode()” used to insert a value into the list.
  • Declare the structure pointer variables “newNode”, “dataPtr”, and “prev” for the structure named “ListNode”.
  • Make a “newNode” value into the received variable value “num”.
  • Using “if…else” condition to check whether the list is empty or not.
    • If the list is empty then initialize “head” pointer with the value of “newNode” variable.
    • Otherwise, make a “while” loop to test whether the “num” value is less than the list values or not.
      • Use “if…else” condition to initialize the value into list.
• Declare a class template and define a function named “deleteNode()” to delete a value from the list.
  • Declare the pointer variables “dataPtr”, and “prev” for the structure named “ListNode”.
  • Using “if…else” condition to check whether the “head” value is equal to “num” or not.
    • Initialize the variable “dataPtr” with the value of the variable “head”.
    • Remove the value using “delete” operator and reassign the “head” value into the “dataPtr”.
    • If the “num” value not equal to the “head” value, then define the “while” loop to assign the “dataPtr” into “prev”.
      • Use “if” condition to delete the “prev” pointer.
• Declare a class template and define a function named “getTotal()” to calculate total value in a list.
  • Define a variable named “total” and initialize it to “0” in type of template.
  • Define a pointer variable “nodePtr” for the structure “ListNode” and initialize it to be “NULL”.
  • Assign the value of “head” pointer into “nodePtr”.
  • Define a “while” loop to calculate “total” value of the list.
  • Return a value of “total” to the called function.
• Declare a class template and define a function named “numNodes()” to find the number of values that are presented in the list.
  • Declare a variable named “count” in type of “integer”.
  • Define a pointer variable “nodePtr” and initialize it to be “NULL”.
  • Assign a pointer variable “head” to the “nodePtr”.
  • Define a “while” loop to traverse and count the number of elements in the list.
• Declare a class template and define a function named “getAverage()”to find an average value of elements that are presented in list.
• Declare a class template and define a function named “getLargest()”to find largest element in the list.
  • Declare a template variable “largest” and pointer variable “nodePtr” for the structure.
  • Using “if” condition, assign the value of “head” into “largest” variable.
  • Using “while” loop, traverse the list until list will be empty.
    • Using “if” condition, check whether the value of “nodePtr” is greater than the value of “largest” or not.
    • Assign address of “nodePtr” into “nodePtr”.
  • Return a value of “largest” variable to the called function.
• Declare a class template and define a function named “getSmallest()” to find largest element in the list.
  • Declare a template variable “smallest” and pointer variable “nodePtr” for the structure.
  • Using “if” condition, assign the value of “head” into “smallest” variable.
  • Using “while” loop, traverse the list until list will be empty.
    • Using “if” condition, check the value of “nodePtr” is smaller than the value of “smallest”.
    • Assign address of “nodePtr” into “nodePtr”.
  • Return a value of “smallest” variable to the called function.
• Declare a class template and define a function named “getSmallestPosition()” to find the position of smallest value in the list.
  • Declare a template variable “smallest” and pointer variable “nodePtr” for the structure.
  • Using “while” loop traverses the list until the list will be empty.
    • Using “if” condition, find the position of “smallest” value in the list.
  • Return the value of “position” to the called function.
• Declare a class template and define a function named “getLargestPosition()” to find the position of largest value in the list.
  • Declare a template variable “largest” and pointer variable “nodePtr” for the structure.
  • Using “while” loop traverses the list until the list will be empty.
    • Using “if” condition, find the position of “largest” value in the list.
  • Return the value of “position” to the called function.
• Define the destructor to destroy the values in the list.
  • Declare the structure pointer variables “dataPtr”, and “nextNode” for the structure named “ListNode”.
  • Initialize the “head” value into the “dataPtr”.
  • Define a “while” loop to make the links of node into “nextNode” and remove the node using “delete” operator.

main.cpp:

• Include the required header files into the program.
• Declare a variable “months” in type of integer.
• Read the value of “months” from user and using “while” loop to validate the data entered by user.
• Declare an object named “rainfall” for the class “IntList”.
• Using “for” loop, read an input for every month from user.
  • Append the value entered from user into the list.
• Make a call to “getTotal()”, “getAverage()”, “getLargest()”, “getSmallest()”, “getLargestPosition()”, and “getSmallestPosition()” function and display the values on the screen.