【方法】获取磁盘容量, Bar Windows API, Purasbar

Floor 1 巨大八爪鱼 3/4/16 22:50

#include <iostream>
#include <Windows.h>

using namespace std;

int main(void)
{
   DWORD dwSPC, dwBPS, dwNOFC, dwTNOC;
   GetDiskFreeSpace(TEXT("C:\\"), &dwSPC, &dwBPS, &dwNOFC, &dwTNOC);
   cout << dwSPC << endl;
   cout << dwBPS << endl;
   cout << dwNOFC << endl;
   cout << dwTNOC << endl << endl;

   DWORD64 dw64 = dwSPC * dwBPS;
   cout << "可用空间: " << (dw64 * dwNOFC) / 1024.0 / 1024.0 / 1024.0 << "GB" << endl;
   cout << "容量: " << (dw64 * dwTNOC) / 1024.0 / 1024.0 / 1024.0 << "GB" << endl;

   system("pause");
   return 0;
}

Floor 2 巨大八爪鱼 3/4/16 22:50

【输出】
8
512
3917916
50331647

可用空间: 14.9457GB
容量: 192GB
Press any key to continue . . .

Floor 3 巨大八爪鱼 3/4/16 22:57

【另一种方法】
ULARGE_INTEGER FBAT, TNOB, TNOFB;
GetDiskFreeSpaceEx(TEXT("C:\\"), &FBAT, &TNOB, &TNOFB);
memcpy(&dw64, &FBAT.LowPart, sizeof(DWORD64));
cout << "总可用字节数: " << dw64 << endl;
memcpy(&dw64, &TNOB.LowPart, sizeof(DWORD64));
cout << "容量: " << dw64 << endl;
memcpy(&dw64, &TNOFB.LowPart, sizeof(DWORD64));
cout << "用户可用字节数: " << dw64 << endl;

Floor 4 巨大八爪鱼 3/5/16 0:06

memcpy用于将ULARGE_INTEGER转化为DWORD64

Floor 5 巨大八爪鱼 7/17/16 20:20

ULARGE_INTEGER是一个共用体类型：

typedef union _ULARGE_INTEGER {
struct {
    DWORD LowPart;
    DWORD HighPart;
};
struct {
    DWORD LowPart;
    DWORD HighPart;
} u;
ULONGLONG QuadPart;
} ULARGE_INTEGER, *PULARGE_INTEGER;

如果编译器支持64位的类型，那么直接用x.QuadPart成员就行了，

如果不支持，就用x.LowPart和x.HighPart来访问（和x.u.LowPart和x.u.HighPart等价）

因此获取磁盘容量时可以不用memcpy，直接输出就行了：

ULARGE_INTEGER FBAT, TNOB, TNOFB;
GetDiskFreeSpaceEx(TEXT("C:\\"), &FBAT, &TNOB, &TNOFB);

cout << "总可用字节数: " << FBAT.QuadPart << endl;
cout << "容量: " << TNOB.QuadPart << endl;
cout << "用户可用字节数: " << TNOFB.QuadPart << endl;

Floor 6 巨大八爪鱼 7/17/16 20:21

GetDiskFreeSpaceEx(磁盘, 总可用空间, 容量, 用户可用空间);

.QuadPart就是字节数了


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	Floor 1 巨大八爪鱼 3/4/16 22:50 #include <iostream> #include <Windows.h> using namespace std; int main(void) { DWORD dwSPC, dwBPS, dwNOFC, dwTNOC; GetDiskFreeSpace(TEXT("C:\\"), &dwSPC, &dwBPS, &dwNOFC, &dwTNOC); cout << dwSPC << endl; cout << dwBPS << endl; cout << dwNOFC << endl; cout << dwTNOC << endl << endl; DWORD64 dw64 = dwSPC * dwBPS; cout << "可用空间: " << (dw64 * dwNOFC) / 1024.0 / 1024.0 / 1024.0 << "GB" << endl; cout << "容量: " << (dw64 * dwTNOC) / 1024.0 / 1024.0 / 1024.0 << "GB" << endl; system("pause"); return 0; }
	Floor 2 巨大八爪鱼 3/4/16 22:50 【输出】 8 512 3917916 50331647 可用空间: 14.9457GB 容量: 192GB Press any key to continue . . .
	Floor 3 巨大八爪鱼 3/4/16 22:57 【另一种方法】 ULARGE_INTEGER FBAT, TNOB, TNOFB; GetDiskFreeSpaceEx(TEXT("C:\\"), &FBAT, &TNOB, &TNOFB); memcpy(&dw64, &FBAT.LowPart, sizeof(DWORD64)); cout << "总可用字节数: " << dw64 << endl; memcpy(&dw64, &TNOB.LowPart, sizeof(DWORD64)); cout << "容量: " << dw64 << endl; memcpy(&dw64, &TNOFB.LowPart, sizeof(DWORD64)); cout << "用户可用字节数: " << dw64 << endl;
	Floor 4 巨大八爪鱼 3/5/16 0:06 memcpy用于将ULARGE_INTEGER转化为DWORD64
	Floor 5 巨大八爪鱼 7/17/16 20:20 ULARGE_INTEGER是一个共用体类型： typedef union _ULARGE_INTEGER { struct { DWORD LowPart; DWORD HighPart; }; struct { DWORD LowPart; DWORD HighPart; } u; ULONGLONG QuadPart; } ULARGE_INTEGER, *PULARGE_INTEGER; 如果编译器支持64位的类型，那么直接用x.QuadPart成员就行了，如果不支持，就用x.LowPart和x.HighPart来访问（和x.u.LowPart和x.u.HighPart等价）因此获取磁盘容量时可以不用memcpy，直接输出就行了： ULARGE_INTEGER FBAT, TNOB, TNOFB; GetDiskFreeSpaceEx(TEXT("C:\\"), &FBAT, &TNOB, &TNOFB); cout << "总可用字节数: " << FBAT.QuadPart << endl; cout << "容量: " << TNOB.QuadPart << endl; cout << "用户可用字节数: " << TNOFB.QuadPart << endl;
	Floor 6 巨大八爪鱼 7/17/16 20:21 GetDiskFreeSpaceEx(磁盘, 总可用空间, 容量, 用户可用空间); .QuadPart就是字节数了

【方法】获取磁盘容量

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