I have written a program to take roman numerals in, and parse them into arabic integers. The problem I'm having is parameters with IIIII=5 and not V. Can anyone help?
public class ArabicNumeral extends NumberStringEva {
ArabicNumeral(){
super("IVXLCDM");
} // end of constructor
private int romanValue(char cAry){
switch (cAry){
case 'M':
return1000;
case 'D':
return 500;
case 'C':
return 100;
case 'L':
return 50;
case 'X':
return 10;
case 'V':
return 5;
case 'I':
return 1;
} // end of romanVlaue
// given a Roman character this method converts it to an integer
// For example Given I returns 1, X returns 10, etc
return -999;
} // end of romanVlaue
/////////////
// STUB ONLY ~ needs code and needs javadoc
/////////////
public
String arabicNumeralString (String sTest){
int t;
int ans=0;
/// To upper case method put here See lec 5/
sTest=sTest.toUpperCase();
// What about mixed case?! :-)
t=evalTheString(sTest);
if (t < 0) {
System.out.println("\tArabicNumeral: sTest"+sTest+" is invalid Roman Numeral string");
return null;
}
else {
System.out.println("\tArabicNumeral: sTest"+sTest+" is valid Roman Numeral string");
char cAry[]=sTest.toCharArray();
for (int i=0;i<cAry.length;i++){
cAry[i]=(char)romanValue(cAry[i]);
}
for (int i=0;i<cAry.length;i++) {
if(i<cAry.length-1) {
if(cAry[i] >= cAry[i+1]){
//add to running total
ans= ans + cAry[i];
}
else{
ans= ans - cAry[i];
//sub to running total
}
}
else
ans=ans+cAry[i];
}
/* //1. convert sTest to char array cAry[] -- see Lec 4
char cAry[] = sTest.toCharArray();
// else look ahead to determine if you add or sub the running total (ans)
*/
// your code goes here...could call a private method or three...
//ans=9; // the hard-coded 9 is to allow it to compile...
//
return Integer.toString(ans);
}
} // end of arabicNumeralString
public String toString() {
return ("Arabic Numeral is using "+super.toString());
} // end of toString
} // end of ArabicNumeral
[ March 02, 2008: Message edited by: Frankhank White ]
