Question

writefile的使用

#include "windows.h"

main()
{
HANDLE fileHandle;
fileHandle=CreateFile("d:\\Hello.txt",GENERIC_WRITE,FILE_SHARE_WRITE,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
char data="http://www.baidu.com/";
DWORD a;
unsigned long b;
OVERLAPPED * c;
WriteFile(fileHandle,data,a,0,c);

}

编译可以通过，运行不了。

Answer 1

#include "windows.h"
#include "iostream"
int main()
{
HANDLE fileHandle;
fileHandle=CreateFile("d:\\Hello.txt", GENERIC_WRITE, FILE_SHARE_WRITE, 0, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
//如果使用OPEN_EXISTING则不会创建文件
if(fileHandle == INVALID_HANDLE_VALUE)
return 1;
char *data="http://www.baidu.com/";
DWORD a = 25;
unsigned long b;
OVERLAPPED c;
WriteFile(fileHandle, data, a, &b, NULL);
return 0;
}
参考资料:解读VC++编程中的文件操作API和CFile类