Roman to integer

roman to integer/README.md

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+# Roman to Integer Converter
+
+I have created a Java Program to convert Roman numbers to integers. 

roman to integer/file.java

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+public class Solution {
+ public int romanToInt(String A) {
+ int ans=0;
+ int i=0;
+ while(i<A.length()){
+ if(i+1<A.length()){
+ if(getValue(A.charAt(i+1))>getValue(A.charAt(i))){
+ ans+=getValue(A.charAt(i+1))-getValue(A.charAt(i));
+ i+=2;
+ }else{
+ ans+=getValue(A.charAt(i));
+ i++;
+ }
+ }else{
+ ans+=getValue(A.charAt(i));
+ i++;
+ }
+ }
+ return ans;
+ }
+ int getValue(char ch){
+ switch(ch){
+ 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 -1;
+ }
+ }
+}