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// example.cpp
// Program to demonstrate ConfigFile class
#include <string>
#include <iostream>
#include "ConfigFile.h"
#include "Triplet.h"
using std::string;
using std::cout;
using std::endl;
int main( void )
{
// A configuration file can be loaded with a simple
ConfigFile config( "example.inp" );
// Values can be read from the file by name
int apples;
config.readInto( apples, "apples" );
cout << "The number of apples is " << apples << endl;
double price;
config.readInto( price, "price" );
cout << "The price is $" << price << endl;
string title;
config.readInto( title, "title" );
cout << "The title of the song is " << title << endl;
// We can provide default values in case the name is not found
int oranges;
config.readInto( oranges, "oranges", 0 );
cout << "The number of oranges is " << oranges << endl;
int fruit = 0;
fruit += config.read( "apples", 0 );
fruit += config.read( "pears", 0 );
fruit += config.read( "oranges", 0 );
cout << "The total number of apples, pears, and oranges is ";
cout << fruit << endl;
// Sometimes we must tell the compiler what data type we want to
// read when it's not clear from arguments given to read()
int pears = config.read<int>( "pears" );
cout << "The number of pears is " << pears;
cout << ", but you knew that already" << endl;
// The value is interpreted as the requested data type
cout << "The weight is ";
cout << config.read<string>("weight");
cout << " as a string" << endl;
cout << "The weight is ";
cout << config.read<double>("weight");
cout << " as a double" << endl;
cout << "The weight is ";
cout << config.read<int>("weight");
cout << " as an integer" << endl;
// When reading boolean values, a wide variety of words are
// recognized, including "true", "yes", and "1"
if( config.read( "sale", false ) )
cout << "The fruit is on sale" << endl;
else
cout << "The fruit is full price" << endl;
// We can also read user-defined types, as long as the input and
// output operators, >> and <<, are defined
Triplet point;
config.readInto( point, "zone" );
cout << "The first point in the zone is " << point << endl;
// The readInto() functions report whether the named value was found
int pommes = 0;
if( config.readInto( pommes, "pommes" ) )
cout << "The input file is in French: ";
else if( config.readInto( pommes, "apples" ) )
cout << "The input file is in English: ";
cout << "The number of pommes (apples) is " << pommes << endl;
// Named values can be added to a ConfigFile
config.add( "zucchini", 12 );
int zucchini = config.read( "zucchini", 0 );
cout << "The number of zucchini was set to " << zucchini << endl;
// And values can be removed
config.remove( "pears" );
if( config.readInto( pears, "pears" ) )
cout << "The pears are ready" << endl;
else
cout << "The pears have been eaten" << endl;
// An entire ConfigFile can written (and restored)
cout << "Here is the modified configuration file:" << endl;
cout << config;
return 0;
}
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