编写C++风格的程序，解决百钱问题：将1元人民币兑换成1,2,5分的人民币，有多少种换法？以清晰的形式输出所有结果，注意钱币的输出形式（小数点后两位）。-To write C++ style program, to solve one hundred questions: 1 yuan to be converted into 1,2,5 points yuan, how many kinds of change? Output all of the results presented in l