题解 | 特殊的科学计数法

import java.util.Scanner;
import java.math.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String dataStr = in.next();
        char[] dataChar = dataStr.toCharArray();
        int c = dataChar.length - 1;
        int data = 0;
        //小数点后第二位数是否大于5
        data += (dataChar[0] - '0') * 10;
        data += (dataChar[1] - '0');
        if(dataChar[2] - '0' > 4) {
            data++;
        }
        if(data >= 100) {
             c++;
        }

       char[] res = String.valueOf(data).toCharArray();
        System.out.println(res[0] + "." + res[1] + "*10^" + c);
        if(in != null) {
            in.close();
        }
    }
}