BCB-DG's Blog

#include <windows.h>
#include <stdio.h>
int main(int argc, LPTSTR argv[]) {
    DWORD lowSize, highSize;
    HANDLE hFile;
    hFile = CreateFile(argv[1], GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL);
    if(hFile == INVALID_HANDLE_VALUE) {
        printf("open file error: %x", GetLastError());
        return 1;
    }
    lowSize = GetFileSize(hFile, &highSize);
    printf("the size of %s is %.2fMB", argv[1], lowSize / 1024.0 / 1024.0);
    return 0;
}

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char* argv[]) {
    FILE* fp;
    long size;
    fp = fopen(argv[1], "rb");
    if(fp == NULL) {
        perror("open file error:");
        return 1;
    }
    fseek(fp, 0, SEEK_END);
    size = ftell(fp);
    fclose(fp);
    printf("the size of %s is %.2fMB", argv[1], size / 1024.0 / 1024.0);
}

typedef struct _WIN32_FIND_DATA {
  DWORD dwFileAttributes;
  FILETIME ftCreationTime;
  FILETIME ftLastAccessTime;
  FILETIME ftLastWriteTime;
  DWORD nFileSizeHigh;
  DWORD nFileSizeLow;
  DWORD dwReserved0;
  DWORD dwReserved1;
  TCHAR cFileName[MAX_PATH];
  TCHAR cAlternateFileName[14];
} WIN32_FIND_DATA, *PWIN32_FIND_DATA, *LPWIN32_FIND_DATA;
HANDLE WINAPI FindFirstFile(
  __in LPCTSTR lpFileName,
  __out LPWIN32_FIND_DATA lpFindFileData
);
BOOL WINAPI FindNextFile(
  __in HANDLE hFindFile,
  __out LPWIN32_FIND_DATA lpFindFileData
);

#include <windows.h>
#include <stdio.h>
int main(int argc, TCHAR* argv[]) {
    HANDLE hFile;
    int i;
    WIN32_FIND_DATA findData;
    BOOL bFind = FALSE;
    if(argc != 2) {
        printf("usage: FileSize2 file");
        return 1;
    }
    hFile = FindFirstFile(argv[1], &findData);
    if(hFile != INVALID_HANDLE_VALUE) bFind = TRUE;
    while(bFind) {
     printf("the size of %40s is %10.2f\n", findData.cFileName, findData.nFileSizeLow / 1024.0 / 1024.0);
        bFind = FindNextFile(hFile, &findData);
    }
    FindClose(hFile);
}