天梯赛题号L1-002打印沙漏（C++）

    #include <iostream>
    #include <cmath>
    //We will use sqrt function.
    
    
    //原理：输入数字和符号；经过计算后，给出多余数字和最外层字符显示数；利用最外层字符显示数逐行输出，显示多余数字。
    //The core princple: First, we import the number and the character; and after calculating, we can get 
    //the redundance value (acronym: RedunVal) and the number of characters of the first row
    //(acronym: FirRowCharNum); Finally, we utilize FirRowCharNum to display characters row by row and RedunVal.
    
    
    //输入函数 The input function of two data
    void input2(int& num, char& ch) {
    	std::cin >> num;
    	std::cin >> ch;