ArraysJavaPrograms/Roman.java at main · piyushwattakhare/ArraysJavaPrograms · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
package Arrays;

public class Roman {
	public static void main(String[] args) {


		String s="IV";
		int val=0;

		for(int i=0;i<s.length();i++) {

			int curr= getValue(s.charAt(i));
			if(i+1<s.length()) {
				int next=getValue(s.charAt(i+1));

				if(curr<next) {
					val=val-curr;

				}
				else {
					val=val+curr;
				}
			}
			else
			{
				val=val+curr;
			}
		}
		System.out.println(val);
	}


	static int getValue(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;  // for safety if invalid character
	    }
	}


	}