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package leetcode;public class RomantoInt {public static void main(String[] args) {String s="MCDLXXVI";int a;int b;int c;int d;String sa="";String sb="";String sc="";String sd="";String flag="千";for (int i = 0; i < s.length(); i++) {String t=s.substring(i,i+1);if (flag.equals("千")) {if(t.equals("M")){sa+=t;continue;}else {flag="百";}}if (flag.equals("百")) {if (t.equals("C")||t.equals("D")||t.equals("M")) {sb+=t;continue;}else {flag="十";}}if (flag.equals("十")) {if (t.equals("X")||t.equals("L")||t.equals("C")) {sc+=t;continue;}else {flag="个";}}if (flag.equals("个")) {if (t.equals("I")||t.equals("V")||t.equals("X")) {sd+=t;continue;}}}System.out.println("sa="+sa);System.out.println("sb="+sb);System.out.println("sc="+sc);System.out.println("sd="+sd);a=sa.length();if (sb.length()==0) {b=0;}else if (sb.contains("M")) {b=9;}else if(sb.substring(0,1).equals("D")){b=5+sb.length()-1;}else if (sb.contains("D")) {b=4;}else {b=sb.length();}if (sc.length()==0) {c=0;}else if (sc.contains("C")) {c=9;}else if(sc.substring(0,1).equals("L")){c=5+sc.length()-1;}else if (sc.contains("L")) {c=4;}else {c=sc.length();}if (sd.length()==0) {d=0;}else if (sd.contains("X")) {d=9;}else if(sd.substring(0,1).equals("V")){d=5+sd.length()-1;}else if (sd.contains("V")) {d=4;}else {d=sd.length();}System.out.println("该罗马数字="+(1000*a+100*b+10*c+d));}}

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