#include <windows.h>
#include <stdio.h>

int main() {
    ULARGE_INTEGER totalBytes;
    ULARGE_INTEGER freeBytes;

    // ドライブのパスを指定
    LPCWSTR drivePath = L"C:\\";

    // ドライブの容量を取得
    if (GetDiskFreeSpaceEx(drivePath, NULL, &totalBytes, &freeBytes)) {
        printf("Total space on drive %ls: %I64u bytes\n", drivePath, totalBytes.QuadPart);
        printf("Free space on drive %ls: %I64u bytes\n", drivePath, freeBytes.QuadPart);
    }
    else {
        printf("Error getting disk space. Error code: %lu\n", GetLastError());
    }

    return 0;
}