C++程序实例

//<eg>给定一个字符，用它构造一个对角线长5个字符，倾斜放置的菱形。
#include <iostream>
using namespace std;
int main()
{
    char a;
    while (true)
    {
        cout << "请输入任意字符：";
        cin >> a;
        cout << "  " << a << endl;
        cout << " " << a << a << a << endl;
        cout << a << a << a << a << a << endl;
        cout << " " << a << a << a << endl;
        cout << "  " << a << endl;
    }
}