Question

我在C ++中有以下代码：

string StringTest = "Test";
bool OriginalWord = true;
for (unsigned int i = 0; i < StringTest(); i++) {
    string Character = towlower(StringTest[i]);
    string CharacterOriginal = StringTest[i];
    if (Character != CharacterOriginal) {
        //t vs. T should trigger false, but never happens?
        //e vs. e should trigger true
        //s vs. s should trigger true 
        //t vs. t should trigger true
        OriginalWord = false;
        }
    }

请注意，我使用towlower代替tolower。

这总会导致OriginalWord=true情况。但是，例如测试应该给我回OriginalWord=false。因为towlower(T)会导致t和CharacterOriginal = T，这意味着它们不一样，因此OriginalWord=false？

我做错了什么？我想它必须对towlower函数

做一些事情

Answer 1

类型转换遇到了一些问题，它们不会使用更严格的编译器标志。请参阅下面代码片段中的注释：

string StringTest = "Test";
bool OriginalWord = true;
for (unsigned int i = 0; i < StringTest.size(); i++) 
// do you mean StringTest.size() instead of StringTest()?
{
    wint_t Character = towlower(StringTest[i]);
    wint_t CharacterOriginal = StringTest[i];
// can't convert a char to a string (or const char *)
// did you meant to use wint_t instead of string?
    if (Character != CharacterOriginal) 
    {
        //t vs. T should trigger false, but never happens?
        //e vs. e should trigger true
        //s vs. s should trigger true 
        //t vs. t should trigger true
        OriginalWord = false;
    }
}

Answer 2

好，你的代码有些麻烦，第一：

string StringTest = "Test"; // you created StringTest as a single variable
 //in the next steps you use it all the time as a array, lets change that.

int count = 10;
string StringTest[count] = { "Test", "test","Test", "test","Test", "test","Test", "test","Test", "test" };

for (unsigned int i = 0; i < StringTest(); i++) // you must use the size of string so:
for (unsigned int i = 0; i < count; i++)

Answer 3

string Character false usage ，它必须是char因为 tolower 返回int（char）而不是字符串。也是为了获得字符串的长度 - ＆gt; 。StringTest的尺寸（）

编辑后的代码在这里！

string StringTest = "Test"; bool OriginalWord = true; for (unsigned int i = 0; i < StringTest.size(); i++) { char Character = tolower(StringTest[i]); char CharacterOriginal = StringTest[i]; if (Character != CharacterOriginal) { OriginalWord = false; } }

C ++ towlower与原始字符的比较失败了吗？

3 个答案: