From 12332b76c111c9232eb542fe60bc78d528f5aeb3 Mon Sep 17 00:00:00 2001
From: Aviral Verma <aviral.robin@gmail.com>
Date: Fri, 1 Sep 2023 21:26:47 +0530
Subject: [PATCH] create:  0012-integer-to-roman

---
 cpp/0012-integer-to-roman.cpp | 95 +++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 cpp/0012-integer-to-roman.cpp

diff --git a/cpp/0012-integer-to-roman.cpp b/cpp/0012-integer-to-roman.cpp
new file mode 100644
index 000000000..7615e5726
--- /dev/null
+++ b/cpp/0012-integer-to-roman.cpp
@@ -0,0 +1,95 @@
+/* Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M.
+
+Symbol       Value
+I             1
+V             5
+X             10
+L             50
+C             100
+D             500
+M             1000
+For example, 2 is written as II in Roman numeral, just two one's added together. 12 is written as XII, which is simply X + II. The number 27 is written as XXVII, which is XX + V + II.
+
+Roman numerals are usually written largest to smallest from left to right. However, the numeral for four is not IIII. Instead, the number four is written as IV. Because the one is before the five we subtract it making four. The same principle applies to the number nine, which is written as IX. There are six instances where subtraction is used:
+
+I can be placed before V (5) and X (10) to make 4 and 9. 
+X can be placed before L (50) and C (100) to make 40 and 90. 
+C can be placed before D (500) and M (1000) to make 400 and 900.
+Given an integer, convert it to a roman numeral.
+Example 
+Input: num = 1994
+Output: "MCMXCIV"
+Explanation: M = 1000, CM = 900, XC = 90 and IV = 4. */
+
+class Solution {
+public:
+    string intToRoman(int num) {
+       string s="";
+       while(num>=1000)
+       {
+           s+="M";
+           num=num-1000;
+       }
+       if(num>=900)
+       {
+           s+="CM";
+           num=num-900;
+       }
+       while(num>=500)
+       {
+           s+="D";
+           num=num-500;
+       }
+       if(num>=400)
+       {
+           s+="CD";
+           num=num-400;
+       }
+       while(num>=100)
+       {
+           s+="C";
+           num=num-100;
+       }
+       if(num>=90)
+       {
+           s+="XC";
+           num=num-90;
+       }
+       while(num>=50)
+       {
+           s+="L";
+           num=num-50;
+       }
+       if(num>=40)
+       {
+           s+="XL";
+           num=num-40;
+       }
+       while(num>=10)
+       {
+           s+="X";
+           num=num-10;
+       }
+       if(num>=9)
+       {
+           s+="IX";
+           num=num-9;
+       }
+       while(num>=5)
+       {
+           s+="V";
+           num=num-5;
+       }
+       if(num>=4)
+       {
+           s+="IV";
+           num=num-4;
+       }
+       while(num>=1)
+       {
+           s+="I";
+           num=num-1;
+       }
+       return s; 
+    }
+};
\ No newline at end of file