Open WLsix opened 6 years ago
string a ="123456789";foreach(char b in a){foreach(char c in a){if(b==c){Console.WriteLine("数字{0}有重复",b);}}}
string a ="123456789";foreach(char b in a){foreach(char c in a){if(b==c){Console.WriteLine("数字{0}有重复",b);}}}