Dear,
Here is the code
//Class Declaration
#include<string>
using namespace std;
class romanType
{
public :
romanType( string = "" );
void setRoman( string );
void convertToDecimal();
void printRoman();
void printDecimal();
private:
string roman;
int decimal;
};//end class definition of romanType
romanType::romanType( string myRoman )
{
roman = myRoman;
decimal = 0;
}//end constructor romanType
void romanType::setRoman( string myRoman )
{
roman = myRoman;
decimal = 0;
}//end function setRoman
void romanType::convertToDecimal()
{
char romans[7] = { 'M', 'D', 'C', 'L', 'X', 'V', 'I'};
int decimals[ 7 ] = { 1000, 500, 100, 50, 10, 5, 1 };
int j, pos;
size_t len = roman.length();
//process the numeral
for ( unsigned int i = 0; i < len - 1; i++ )
{
//find the roman letter
for ( pos = 0; pos < 7; pos++ )
if ( roman.at( i ) == romans[ pos ] )
break;
//check for validity of the roman letter
if ( pos < 7 )
{
//check the next roman letter's value
for ( j = 0; j < pos; j++ )
if ( roman.at( i + 1 ) == romans[ j ] )
break;
//add or subtract the dec. val
//according to the values of j and pos
if ( j == pos )
decimal += decimals[ pos ];
else
decimal -= decimals[ pos ];
}
}//end for
//process the last numeral value
for ( j = 0; j < 7; j++ )
if ( roman.at( len - 1 ) == romans[ j ] )
break;
//add the dec. val of roman letter to the dec. number
decimal += decimals[ j ];
}//end function convertToDecimal
void romanType::printRoman()
{
cout << "nntThe roman numeral is " << roman;
}//end function printRoman
void romanType::printDecimal()
{
cout << "ntThe decimal equivalent of the "
<< "given roman numeral is " << decimal;
}//end function printDecimal
/* Main method to test the class*/
int main()//function main begins program execution
{
//let the user know about the program
cout << "nntProgram that convert Roman Numeral"
<< " into decimal form.";
//instantiate object of type romanType
romanType r;
string rns[ 3 ] = { "CCCLIX", "MCXIV", "MDCLXVI" };
for ( int i = 0; i < 3; i++ )
{
//set the roman numeral string
r.setRoman( rns[ i ] );
//convert the roman numeral into decimal form
r.convertToDecimal();
//print the roman numeral
r.printRoman();
//print the decimal form of numeral
r.printDecimal();
}//end for
cout << "nnt";
system( "pause" );
return 0;// indicate program executed successfully
}// end of function, main
Hope this will help you..
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