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[C/C++ 演算法]純C++讀取清單列表進行檔案打包和解打包     C++二進位檔案讀寫、GetFileSize、C++偵測檔案大小、C++檔案路徑分割、C++抓取檔名、C++抓取副檔名、C++建立目錄、C++判斷目錄是否存在、C++記憶體清空、C++ vector使用、C++文字檔讀取、C++動態配置記憶體、GetFileName   #include #include #include #include #include #include #include   using namespace std;   //最多打包文件個數 #define MAX_FILE_COUNT 1024 //最大路徑字元長度 #define MAX_PATH 260 //文件頭 struct FileHead {     unsigned int FileCount;// 文件個數     unsigned int FileLen[MAX_FILE_COUNT];// 文件大小     char FileName[MAX_FILE_COUNT][MAX_PATH];// 檔案名 }; char gchrFileName[200],gchrPath[200]; char gchrFileExt[20]; void GetFileName(char *data); long GetFileSize(FILE *pf); int main(int argc, char *argv[]) {     int i=0;     FILE *pf=’\0′;     char buf[513];     string strbuf;     FILE *pWorkFile = ‘\0’;     FileHead fh;     FILE *pOutFile = ‘\0’;     char chrCABFilePath[512];     unsigned char *pTmpData = NULL;     char chrOuputPath[256];     char tmpFileName[MAX_PATH];     FILE *pCAB = ‘\0’;       cout << “Hello world!” << endl;     memset(buf,0,sizeof(buf));     pf=fopen(“filelist.txt”,”r”);     vector vec_file;     vec_file.clear();     while(fgets(buf,512,pf) != NULL)     {         buf[strlen(buf)-1]=’\0′;         vec_file.push_back(buf);     }       // 當文件內的路徑存到結構體內，並抓取檔案大小     memset(&fh,0,sizeof(FileHead));     fh.FileCount=0;     for ( i = 0 ; i < vec_file.size() ; i++ )     {         strbuf=vec_file[i];         strcpy(buf, strbuf.c_str());         strcpy(fh.FileName[fh.FileCount],buf);         pWorkFile= fopen(fh.FileName[i],”rb”);         fh.FileLen[i] = GetFileSize(pWorkFile);         fclose(pWorkFile);         pWorkFile = ‘\0’;         //printf(“%s,%ld\n”,fh.FileName[i],fh.FileLen[i]);         fh.FileCount++;     }       // 將所有指定檔案打包       memset(chrCABFilePath,0,sizeof(char));     strcpy(chrCABFilePath,”test.cab”);     //*     pOutFile = fopen(chrCABFilePath,”wb”);     fwrite(&fh,sizeof(fh),1,pOutFile);// 寫入檔頭     for (i = 0 ; i < fh.FileCount ; i++ )     {         pWorkFile=’\0′;         pWorkFile = fopen(fh.FileName[i],”rb”);         if ( NULL == pWorkFile )         {             fclose(pWorkFile);             fclose(pOutFile);             return -1;         }           pTmpData = new unsigned char[fh.FileLen[i]];         fread(pTmpData,fh.FileLen[i],1,pWorkFile);         if ( ferror(pWorkFile) )         {             fclose(pWorkFile);             fclose(pOutFile);             return -2;         }           fwrite(pTmpData,fh.FileLen[i],1,pOutFile);         if ( ferror(pOutFile) )         {             fclose(pWorkFile);             fclose(pOutFile);             return -3;         }         delete [] pTmpData;         pTmpData=’\0′;         fclose(pWorkFile);     }     fclose(pOutFile);     pOutFile=’\0′;     //*/     // 將打包檔解開，放到指定路徑     strcpy(chrCABFilePath,”D:\\Visual project code\\CB_CustomCAB\\test.cab”);     memset(chrOuputPath,0,sizeof(char));     strcpy(chrOuputPath, “C:\\CAB_Buf”);     if((mkdir(chrOuputPath)==0)||(chdir(chrOuputPath)==0))     {         pCAB = fopen(chrCABFilePath,”rb”);         memset(&fh,0x0,sizeof(fh));         fread(&fh,sizeof(fh),1,pCAB);//讀取文件檔頭         for ( int i = 0 ; i < fh.FileCount ; i++ )         {             pTmpData = new unsigned char[fh.FileLen[i]];             fread(pTmpData,fh.FileLen[i],1,pCAB);             GetFileName(fh.FileName[i]);               memset(tmpFileName,0,sizeof(char));             sprintf(tmpFileName,”%s\\%s%s”,chrOuputPath,gchrFileName,gchrFileExt);             pWorkFile = ‘\0’;             pWorkFile = fopen(tmpFileName,”wb”);             fwrite(pTmpData,fh.FileLen[i],1,pWorkFile);             fclose(pWorkFile);             delete [] pTmpData;             pTmpData=’\0′;         }         fclose(pCAB);     }     return 0; } //獲取檔大小(傳入以二進制方式打開的檔指針) long GetFileSize(FILE *pf) {     // 指針移到檔案結尾     fseek(pf,0,/*SEEK_END*/ 2);     return ftell(pf); } void GetFileName(char *data) {     gchrPath[0]=’\0′;     gchrFileName[0]=’\0′;     gchrFileExt[0]=’\0′;     int i,intcount;     int j=0;     int k=0;     char d;     intcount=strlen(data);// 計算原本完整檔案路徑長度     for(i=(intcount-1);i>=0;i–)     {         if((data[i]!=’/’)&&(data[i]!=’\\’))         {             d=data[i];             gchrPath[j]=d;             j++;         }         else         {             break;         }     }     gchrPath[j]=’\0′;     for(int i=0;i     {         if(i         {             gchrFileName[i]=gchrPath[j-i-1];             gchrFileName[i+1]=’\0′;         }         else         {             gchrFileExt[k]=gchrPath[j-i-1];             k++;             gchrFileExt[k]=’\0′;         }     }     gchrPath[0]=’\0′;     for(i=0;i     {         gchrPath[i]=data[i];     }     gchrPath[(intcount-j)]=’\0′;     //cout<     //cout< }