buf 数据写入文件

 FILE *stream;
    if ((stream = fopen("/root/aaa.pdf", "wb")) == NULL) /* open file TEST.$$$ */
        {
            fprintf(stderr, "Cannot open output file.\n");
            return 1;
        }

        fwrite(dest_buf, dest_size, 1, stream); /* 写的struct文件*/
        fclose(stream); /*关闭文件*/

 

参考c++:

fstream file("/root/bbb.pdf", ofstream::app | ios::binary | ofstream::out);
if (!file){
cerr << "open sec.txt failure" << endl;
}
for ( int i = 0; i != m_FileLen; i++){
file.write((char *)&m_pFileBuf[i] , sizeof(m_pFileBuf[i]));
}
cout << endl;
file.close();
file.clear();