C++ 如何将char数组转换为wchar_t数组？
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how to convert char array to wchar_t array?
提问by pradeep
char cmd[40];
driver = FuncGetDrive(driver);
sprintf_s(cmd, "%c:\test.exe", driver);
I cannot use cmdin
我不能用cmd在
sei.lpFile = cmad;
so,
how to convert chararray to wchar_tarray ?
那么，如何将char数组转换为wchar_t数组？
回答by leetNightshade
Just use this:
只需使用这个：
static wchar_t* charToWChar(const char* text)
{
const size_t size = strlen(text) + 1;
wchar_t* wText = new wchar_t[size];
mbstowcs(wText, text, size);
return wText;
}
Don't forget to call delete [] wCharPtron the return result when you're done, otherwise this is a memory leak waiting to happen if you keep calling this without clean-up. Or use a smart pointer like the below commenter suggests.
完成后不要忘记调用delete [] wCharPtr返回结果，否则如果您在没有清理的情况下继续调用它，这就是等待发生的内存泄漏。或者像下面的评论者建议的那样使用智能指针。
Or use standard strings, like as follows:
或者使用标准字符串，如下所示：
#include <cstdlib>
#include <cstring>
#include <string>
static std::wstring charToWString(const char* text)
{
const size_t size = std::strlen(text);
std::wstring wstr;
if (size > 0) {
wstr.resize(size);
std::mbstowcs(&wstr[0], text, size);
}
return wstr;
}
回答by Traveling Tech Guy
From MSDN:
从MSDN：
#include <iostream>
#include <stdlib.h>
#include <string>
using namespace std;
using namespace System;
int main()
{
char *orig = "Hello, World!";
cout << orig << " (char *)" << endl;
// Convert to a wchar_t*
size_t origsize = strlen(orig) + 1;
const size_t newsize = 100;
size_t convertedChars = 0;
wchar_t wcstring[newsize];
mbstowcs_s(&convertedChars, wcstring, origsize, orig, _TRUNCATE);
wcscat_s(wcstring, L" (wchar_t *)");
wcout << wcstring << endl;
}
回答by josefx
From your example using swprintf_swould work
从你的例子使用swprintf_s会工作
wchar_t wcmd[40];
driver = FuncGetDrive(driver);
swprintf_s(wcmd, "%C:\test.exe", driver);
Note the C in %Chas to be written with uppercase since driver is a normal char and not a wchar_t.
Passing your string to swprintf_s(wcmd,"%S",cmd) should also work
请注意，%C 中的 C必须用大写字母书写，因为驱动程序是普通字符而不是 wchar_t。
将您的字符串传递给 swprintf_s(wcmd,"%S",cmd) 也应该有效
