From b98030c475aa372fa0cdf5ba30aba48032bebf4a Mon Sep 17 00:00:00 2001
From: Avani Gokhale <36026630+avani112@users.noreply.github.com>
Date: Tue, 18 Oct 2022 13:43:11 +0530
Subject: [PATCH] Create RomanToInteger

---
 RomanToInteger | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 RomanToInteger

diff --git a/RomanToInteger b/RomanToInteger
new file mode 100644
index 0000000..cc897e1
--- /dev/null
+++ b/RomanToInteger
@@ -0,0 +1,24 @@
+// 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;
+    }