Question

student1的名字打印正确＆＃34; alice＆＃34;，但student2的名字打印在＆＃34;奇怪的字符＆＃34;。

char * student;
student = "alice";

printf("student1 : %s\n", student);

CString student2;
student2 = "alice";

student = (char *)( LPCSTR )student2;
printf("student2:%s\n", student);

为什么用＆＃34;（char *）（LPCSTR）＆＃34; ，它会返回奇怪的角色吗？

Answer 1

首先，这个程序对我有用。

但是，这并不意味着它是正确的对于MBCS，通常使用_T宏来确保正确声明字符串。

以下是我对代码的简单重写：

#include "stdafx.h"
#include "atlstr.h"

int _tmain(int argc, _TCHAR* argv[])
{
    LPCSTR student = _T("alice");        // Use the provided LPCSTR type instead of char*.
    printf("student1 : %s\n", student);

    CString student2(_T("alice"));       // Initialize a CString with the _T macro

    student = (LPCSTR)student2;          // LPCSTR is typedef to char*. 
                                         // So you effectively had (char*)(char*)student2;
                                         // TypeCasting something twice to the same type is stupid.

    printf("student2:%s\n", student);
    return 0;
}

<强> 输出

student1 : alice
student2:alice

CString格式返回奇怪的字符

1 个答案: