Uses only integers for monetary values to calculate compound interest.

``````/******************************************************

** Name:

** Filename: monetary.cpp

** Project #: Deitel & Deitel 2.51

** Project Description: Modify the program in Fig 2.21 so it uses only
integers for monetary values to calculate the compound
interest.

** Output: Table with year and amount of deposit as it grows  with
interest rate

** Input:  None

** Algorithm: Make all variables for money values as integers, then
put into penny amount.
Run loop till year <= 10
Calculate yearly amount using formula a = p ( 1 + r )^n
Divide amount by 100 giving an integer result
Divide amount using modulus to get remainder to add
cents amount
Print amount followed by period then print cents
End program

******************************************************/

// Include files
#include <iostream>  // used for cin, cout
#include <conio.h>
#include <cmath>
#include <iomanip>
using namespace std;

// Global Type Declarations

// Function Prototypes
void instruct (void);
void pause ();

//Global Variables - should not be used without good reason.

int main ()
{
// Declaration section
int amount,            // amount on deposit
principal = 100000;// starting principal in pennies amount
double rate = .05;        // interest rate

// Executable section
instruct ();

cout <<"Year" << setw ( 27 )
<< "Amount on deposit\n" << endl;

cout << setiosflags ( ios::fixed | ios::showpoint )
<< setprecision ( 2 );

for ( int year = 1; year <= 10; year++ ) {
amount = principal * pow ( 1.0 + rate, year ) ;
cout << setw( 4 ) << year << setw( 18 ) << amount / 100
<< '.';

if ( amount % 100 < 10 )
cout << '0' << amount % 100 << endl;
else
cout << amount % 100 << endl;

}

pause ();
return 0;
}

void instruct (void)
{
// Declaration section

// Executable section
}

void pause ()
{
// Declaration section

// Executable section
cout << "\nPress any key to continue...";
getch();
cout << "\r";
cout << "                            ";
cout << "\r";
}

/*
Program Output

Year         Amount on deposit

1              1050.00
2              1102.50
3              1157.62
4              1215.50
5              1276.28
6              1340.09
7              1407.10
8              1477.45
9              1551.32
10              1628.89

Press any key to continue...

*/``````
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