波形图（人人网2017春招真题）

import java.util.Scanner;

public class Main {
    static int N;

    //记录转换波形
    public static String Waveform_2_Record(String str){
        StringBuffer s = new StringBuffer();
        char[] charArray = str.toCharArray();
        for ( int i = 0 ; i < charArray.length ; ){
            if ( charArray[i] == '_' && charArray[i+1] == '_'){
                s.append('-');
                i += 2;
                continue;
            }else if ( charArray[i] == '/' && charArray[i+1] == '\\'){
                s.append("+");
                i += 2;
                continue;
            }
        }
        return s.toString();
    }

    //波形转换记录
    public static String Record_2_Waveform(String str){
        StringBuffer s = new StringBuffer();
        char[] charArray = str.toCharArray();
        for ( int i = 0 ; i < charArray.length ; i++){
            if ( charArray[i] == '-'){
                s.append("__");
            }
            if (charArray[i] == '+'){
                s.append('/');
                s.append('\\');
            }
        }
        return s.toString();
    }


    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        N = in.nextInt();
        for ( int i = 0 ; i < N ; i++){
            String str = in.next();
            char ch = str.charAt(0);
            if  (ch == '-' || ch == '+') {
                String s = Record_2_Waveform(str);
                System.out.println(s);
                continue;
            }
            if ( ch == '_' || ch == '/'){
                String s = Waveform_2_Record(str);
                System.out.println(s);
                continue;
            }
        }
        in.close();
    }

}