collegeapplications.cpp

C++大学简明教程,解压就行没有密码。希望对大家有用

// Exercise 21.11: CollegeApplications.cpp
// This application inputs standardized test scores and GPA's for a 
// class from the user and uses a function template to display the
// class averages for both of the values.
#include <iostream> // required to perform C++ stream I/O
#include <iomanip> // required for parameterized stream manipulators

using namespace std; // for accessing C++ Standard Library members

// function main begins program execution
int main()
{
   int classSize; // size of the class

   // prompt the user for and input class size
   cout << "\nEnter the number of students in the class: ";
   cin >> classSize;

   // determine whether the user input a valid value
   while ( classSize <= 0 )
   {
      cout << "\nError: Please enter a positive value" << endl;

      // prompt the user for and input class size
      cout << "\nEnter the number of students in the class: ";
      cin >> classSize;
   } // end while

   // dynamically allocate memory for the tests array
   int *tests = new int[ classSize ];

   // dynamically allocate memory for the GPA's array
   double *GPAs = new double[ classSize ];

   for ( int count = 0; count < classSize; count++ )
   {
      // prompt the user for and input the standardized test scores
      cout << "\nEnter student #" << count + 1 << "'s standardized "
           << "test score (0 - 1600): ";
      cin >> tests[ count ];
   
      // determine whether the user entered valid input
      while ( tests[ count ] < 0 || tests[ count ] > 1600 )
      {
         cout << "\nError: Please enter a value between 0 and 1600"
              << endl;

         // prompt the user for and input the standardized test score
         cout << "\nEnter student #" << count + 1 << "'s "
              << "standardized test score (0 - 1600): ";
         cin >> tests[ count ];
      } // end while

      // prompt the user for and input the student's GPA
      cout << "Enter student #" << count + 1 << "'s GPA "
           << "(0.0 - 4.0): ";
      cin >> GPAs[ count ];

      // determine whether the user entered valid input
      while ( GPAs[ count ] < 0.0 || GPAs[ count ] > 4.0 )
      {
         cout << "\nError: Please enter a value between 0.0 and 4.0"
              << endl;
         
         // prompt the user for and input the student's GPA
         cout << "\nEnter student #" << count + 1 << "'s GPA "
              << "(0.0 - 4.0): ";
         cin >> GPAs[ count ];
      } // end while
         
   } // end for

   // calculate and display the standardized test and GPA averages

   return 0; // indicate that program ended successfully

} // end function main

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