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Create RomanToInteger #9

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24 changes: 24 additions & 0 deletions RomanToInteger
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Original file line number Diff line number Diff line change
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// Given a roman numeral, convert it to an integer.
// function:
int roman(char c){
switch(c){
case 'I' : return 1;
case 'V' : return 5;
case 'X' : return 10;
case 'L' : return 50;
case 'C' : return 100;
case 'D' : return 500;
case 'M' : return 1000;
default: return 0;
}
}
public int romanToInt(String s) {
int result=0, multi=0;
for(int i=0;i<s.length();i++){
int c = roman(s.charAt(i));
if(c<=multi) result=result+c;
else result=result+c-2*multi;
multi=c;
}
return result;
}