文件合并函数

先写个简单的文件合并函数(非常简单,贴上来纯粹为了给记忆中加点东西,看到的人不要骂我),有时间写个捆绑的程序

 

// CommbineFile.cpp : 定义控制台应用程序的入口点。
//

//#include "stdafx.h"

#include "stdio.h"
#include "stdlib.h"
#include "windows.h"
bool CombineFile(char *sourceFile,char *attachFile,char *destFile)
{
    FILE *fdSourceFile = NULL;
    FILE *fdAttachFile = NULL;
    int nSourceFileSize=0,nAttachFileSize=0;
    fdSourceFile = fopen(sourceFile,"r");
    fdAttachFile = fopen(attachFile,"r");
    if (!fdSourceFile || !fdAttachFile)
    {
        return false;
    }
    if (fseek(fdSourceFile,0L,SEEK_END))
    {
        return false;
    }
    nSourceFileSize = ftell(fdSourceFile);
    fseek(fdSourceFile,0L,SEEK_SET);
    if (fseek(fdAttachFile,0L,SEEK_END))
    {
        return false;
    }
    nAttachFileSize = ftell(fdAttachFile);
    fseek(fdAttachFile,0L,SEEK_SET);

    char *sBuf = (char *)malloc((nSourceFileSize+1)*sizeof(char));
    if (!sBuf)
    {
        return false;
    }
    char *aBuf = (char *)malloc((nAttachFileSize+1)*sizeof(char));
    if (!aBuf)
    {
        return false;
    }

    memset(sBuf,0,nSourceFileSize+1);//not need,I think
    memset(aBuf,0,nAttachFileSize+1);

    int nSourceRead=0,nAttachRead=0;
    nSourceRead = fread(sBuf,sizeof(char),nSourceFileSize,fdSourceFile);
    nAttachRead = fread(aBuf,sizeof(char),nAttachFileSize,fdAttachFile);

    FILE * fdDestFile = fopen(destFile,"w");
    if (!fdDestFile)
    {
        return false;
    }
    fwrite(sBuf,sizeof(char),nSourceFileSize,fdDestFile);
    fwrite(aBuf,sizeof(char),nAttachFileSize,fdDestFile);

    fclose(fdAttachFile);
    fclose(fdDestFile);
    fclose(fdSourceFile);
    free(sBuf);
    free(aBuf);

    return true;
}

int main(int argc, char *argv[])
{
    CombineFile("D:\\1.txt","D:\\2.txt","D:\\3.txt");
    return 0;
}