salarysurvey.cpp

C++大学简明教程,解压就行没有密码。希望对大家有用

// Tutorial 13: SalarySurvey.cpp
// Application that takes information about employee salaries and
// uses an array to keep track of the number of employees in each
// salary range.
#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

void displayTotals( int [] ); // function prototype

// function main begins program execution
int main()
{
   // define variable and declare an array, initialize values to 0
   double sales = 0;              // sales that user inputs
   int resultArray[ 11 ] = { 0 }; // counts of salary ranges

   // prompt user for and input sales
   cout << "\nEnter sales (-1 to end): ";
   cin >> sales; // get sales

   // display floating-point values as currency
   cout << fixed << setprecision( 2 );
   
   // repeat until user enters sentinel value
   while ( sales >= 0 )
   {
      // calculate salary and index
      double salary = 200 + 0.09 * sales;
      int index = static_cast< int >( salary / 100 ); 

      // update statistics
      if ( index >= 10 )
      {
         resultArray[ 10 ]++;
      } // end if
      else
      {
         resultArray[ index ]++;
      } // end else

      // display salary
      cout << "Total salary: $" << salary << endl;

      // prompt user for and input next sales value
      cout << "\nEnter sales (-1 to end): ";
      cin >> sales; // get sales
   } // end while

   // display salary ranges and totals
   displayTotals( resultArray );

   return 0; // indicates successful termination

} // end function main

// display salary ranges and totals
void displayTotals( int printArray[] )
{
   // define local variables
   int lowerBound; // current salary range's lower bound
   int upperBound; // current salary range's upper bound

   // display a table header
   cout << "\nSalary Range:\tTotal:" << endl;

   // iterate over each salary range between $200 and $999
   for ( int i = 2; i <= 9; i++ )
   {
      lowerBound = i * 100;         // set the current lower bound
      upperBound = lowerBound + 99; // set the current upper bound

      // display range and total number of salaries in that range
      cout << "$" << lowerBound << "-" << upperBound << "\t" 
           << printArray[ i ] << endl;
   } // end for

   // display range and salary count for $1000 and greater
   cout << "$1000+\t\t" << printArray[ 10 ] << endl << endl;

} // end function displayTotals


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