gradebookmanager.cpp

C++大学简明教程,解压就行没有密码。希望对大家有用

// Tutorial 21: GradeBookManager.cpp
// This application stores and processes student grades as ints or
// doubles by using templates
#include <iostream> // required to perform C++ stream I/O
#include <string> // required to access string functions
#include <iomanip> // required for parameterized stream manipulation

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

// function main begins program execution
int main()
{
   // define variables
   int students; // number of students in the course
   string courseName; // name of the course
   
   // determines whether grades are stored as ints or doubles
   int selection; // 1 = ints, 2 = doubles
   
   // format the output to one digit of precision
   cout << fixed << setprecision( 1 );

   // prompt the user for and input number of students
   cout << "\nEnter the number of students: ";
   cin >> students; // get number of students

   // repeat if the user enters an invalid number of students
   while ( students <= 0 ) 
   {
      cout << "\nError: Must have a positive number of students";
      cout << "\nEnter the number of students: ";
      cin >> students;
   } // end while

   // prompt user to choose to process grades as ints or doubles
   cout << "\nSelect the grade type:" << endl;
   cout << "1 - Integer" << endl;
   cout << "2 - Floating-point" << endl;
   cout << "Enter selection: ";
   cin >> selection;

   // repeat until the user selects a valid option
   while ( selection != 1 && selection != 2 )
   {
      cout << "\nError: Invalid choice" << endl;
      cout << "\nSelect the grade type:" << endl;
      cout << "1 - Integer" << endl;
      cout << "2 - Floating-point" << endl;
      cout << "Enter selection: ";
      cin >> selection; 
   } // end while

   cout << endl;

   return 0; // indicates successful termination

} // end function main

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