Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 4 Try This page 105
Using std_lib_facilities.h by Bjarne Stroustrup.
[code language=”cpp”]
// Philipp Siedler
// Bjarne Stroustrup’s PP
// Chapter 4 Try This page 105
#include "std_lib_facilities.h"
int main()
{
const double yenToDollar = 101.10;
const double euroToDollar = 0.89;
const double poundToDollar = 0.76;
double dollar = 1;
char currency = ‘a’;
cout << "Please enter an amount of dollar(s) you want to convert,\nfollowed by the desired conversion currency (yen = y, euro = e, pound = p): \n";
cin >> dollar >> currency;
if (currency == ‘y’)
{
if (dollar*yenToDollar <= 1)
{
cout << dollar << " dollar is " << dollar*yenToDollar << " yen";
}
else
{
cout << dollar << " dollars are " << dollar*yenToDollar << " yen\n";
}
}
else if(currency == ‘e’)
{
if (dollar*euroToDollar <= 1)
{
cout << dollar << " dollar is " << dollar*euroToDollar << " euro\n";
}
else
{
cout << dollar << " dollars are " << dollar*euroToDollar << " euros\n";
}
}
else if (currency == ‘p’)
{
if (dollar*euroToDollar <= 1)
{
cout << dollar << " dollar is " << dollar*poundToDollar << " pound\n";
}
else
{
cout << dollar << " dollars are " << dollar*poundToDollar << " pounds\n";
}
}
else
{
cout << "I dont know what " << currency << " for an currency is\n";
}
keep_window_open();
}
[/code]
Output: Please enter an amount of dollar(s) you want to convert, followed by the desired conversion currency (yen = y, euro = e, pound = p): 130 y 130 dollars are 13143 yen Please enter a character to exit
