文件复制：C语言方法、Windows API的两种方法

#include <stdio.h>
#include <errno.h>

#define BUF_SIZE 256

int main(int argc, char *argv[])
{
    FILE *inFile, *outFile;
    char rec[BUF_SIZE];
    size_t bytesIn, bytesOut;

    if(argc != 3)
    {
        printf("Usage:cpc file1 file2\n");
        return 1;
    }

    inFile = fopen(argv[1],"rb");
    if(inFile == NULL)
    {
        perror(argv[1]);
        return 2;
    }

    outFile = fopen(argv[2],"wb");
    if(outFile == NULL)
    {
        perror(argv[2]);
        return 3;
    }

    while((bytesIn = fread(rec,1, BUF_SIZE,inFile))>0)
    {
        bytesOut = fwrite(rec, 1, bytesIn,outFile);
        if(bytesIn != bytesOut)
        {
            perror("Fatal write error.");
            return 4;
        }
    }

    fclose(inFile);
    fclose(outFile);
    return 0;
}

#include <Windows.h>
#include <stdio.h>

#define BUF_SIZE 256

int main(int argc, LPTSTR argv[])
{
    HANDLE hIn, hOut;
    DWORD nIn, nOut;
    CHAR buffer[BUF_SIZE];

    if(argc != 3)
    {
        printf("Usage:cpw file1 file2\n");
        return 1;
    }
    hIn = CreateFile(argv[1],GENERIC_READ, FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
    if(hIn == INVALID_HANDLE_VALUE)
    {
        printf("Canno open input file. Error:%x\n",GetLastError());
        return 2;
    }

    hOut = CreateFile(argv[2],GENERIC_WRITE,0,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL);
    if(hOut == INVALID_HANDLE_VALUE)
    {
        printf("Cannot open output file.Error:%x\n",GetLastError());
        return 3;
    }

    while(ReadFile(hIn, buffer, BUF_SIZE,&nIn, NULL) && nIn > 0)
    {
        WriteFile(hOut, buffer, nIn,&nOut,NULL);
        if(nIn != nOut)
        {
            printf("Fatal write error:%x\n",GetLastError());
            return 4;
        }
    }
    CloseHandle(hIn);
    CloseHandle(hOut);
    return 0;
}

#include <Windows.h>
#include <stdio.h>

int main(int argc, LPTSTR argv[])
{
    if(argc != 3)
    {
        printf("Usage:cpcf file1 file2\n");
        return 1;
    }
    if(!CopyFile(argv[1], argv[2],FALSE))
    {
        printf("CopyFile Error:%x\n",GetLastError());
        return 2;
    }

    return 0;
}