摘要:
2020-03-26 每日一例第18天 1)使用"+"拼接string字符串 string str = string.Empty; str = "a"; str = str + "b"; str = str + "c"; str = str + "d"; str = str + "e"; Conso 阅读全文
摘要:
2020-03-26 每日一例第17天 string str = "abcdefg"; string str1 = str.Replace("a","0"); Console.WriteLine(str1); Console.ReadKey(); 阅读全文