accountbalance.cpp

来自「C++大学简明教程,解压就行没有密码。希望对大家有用」· C++ 代码 · 共 58 行

// Exercise 7.16: AccountBalance.cpp
// This application calculates a credit balance and
// determines whether the credit limit has been exceeded.
#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()
{
   // define variables to store user input
   double balance; // stores the starting balance
   double amount;  // stores a single amount

   // prompt user for and input starting balance
   cout << "\nEnter starting balance: ";
   cin >> balance;

   // prompt user for and input first debit
   cout << "Enter a transaction amount (0 to end): ";
   cin >> amount;

   // get each transaction amount, using 0 as the sentinel value
   while ( amount != -1 )
   {
      balance -= amount; // add amount to balance

      // prompt user for and input next amount
      cout << "Enter next transaction amount (0 to end): ";
      cin >> amount;
   } // end while

   // specify output format
   cout << fixed << setprecision( 2 );

   // display result
   cout << "\nNew balance: " << amount << endl << endl;

   return 0; // indicate that program ended successfully

} // end function main


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