比较字符串C++

Question

string Foo(string letter)
 {


      for (int j = 0; j < (int)alphabet.length(); j++)
     {

            if (letter[0] == (alphabet[j]));
                 return "SUCCESS";
      }

      return "FAILURE";


 }

alphabet = "Test";

cout << Foo("f") << endl;

这打印SUCCESS甚至认为它不应该.我的比较运算符出了什么问题？

Answer 1

if (letter[0] == (alphabet[j])); // Note the semicolon at the end

你if马上跟着一个空return "SUCCESS";

删除该分号:

if (letter[0] == alphabet[j])
    return "SUCCESS";