rfile.seekg(0,std::ios::beg); std::cout<<"length:"<<length<<std::endl; //allocate memory: buffer=newchar[length]; //read data as a block: rfile.read(buffer,length); rfile.close(); //write to outfile std::fstream wfile("new.txt",std::fstream::out|std::fstream::binary); wfile.write(buffer,length); //delete buffer del...
std::vector<char>& buffer) { std::ifstream infile(strFile.c_str(), std::ifstream::bina...
26//read data as a block: 27rfile.read(buffer,length); 28rfile.close(); 29 30//write to outfile 31std::fstream wfile("new.txt",std::fstream::out|std::fstream::binary); 32wfile.write(buffer,length); 33 34//delete buffer 35delete[] buffer; 36 37//close rfile wfile 38rfile.c...
跟上面的操作流程类似. 唯一不同在于使用输入模式标志ios::in, 使用read()方法. // Sample for C++ File I/O binary file read 1:voidread_from_binary_file() 2:{ 3:WebSites p_Data; 4:fstream binary_file("c:\\test.dat",ios::binary|ios::in); 5:binary_file.read(reinterpret_cast<char*>...
#include <iostream> #include <string> #include <vector> #include <fstream> bool ReadFile(std::string& strFile, std::vector<char>& buffer) { std::ifstream infile(strFile.c_str(), std::ifstream::binary); if (!infile.is_open()) { printf("Read File:%s Error ... \n", strFile.c...
open("./FileName_P.raw", ios::out | ios::binary); // 设置缓存 constexpr int size = 1536 * 1536; unsigned short* Rtemp = new unsigned short[size] {}; float* Wtemp = new float[size] {}; long long int count{}; while (!infile.eof()) { // 计数 cout << (count++) << ...
fstream binary_file("1.dat",ios::out|ios::binary); binary_file.write(reinterpret_cast<char *>(&web),sizeof(website)); binary_file.close; ifstream fin("1.dat",ios::binary); fin.read(reinterpret_cast<char *>(&getweb),sizeof(website)); ...
fstream fpf(filePath, ios::binary); unsigned short* receive_arr = nullptr; try { receive_arr = new unsigned short(1024); } catch (bad_alloc) { cerr << "bad_alloc in" << __LINE__ << endl; } fpf.seekg(sizeof(char) * 98,ios_base::beg); fpf.read((char*)receive_arr,2048)...
read ( char * buffer, streamsize size ); 这里buffer 是一块内存的地址,用来存储或读出数据。参数size 是一个整数值,表示要从缓存(buffer)中读出或写入的字符数。 // reading binary file #include <iostream> #include <fstream.h> constchar* filename = "test.txt"; ...
1. ios::in | ios::binary 2. read 3. file.eof() 4. 10, ios::beg 三、简答题 1.二进制模式跳过字符编码转换(如换行符̊),直接按字节原样读取。图像、音频等文件包含非文本数据,若用文本模式可能导致字节被篡改(如0x0A被转换为0x0D0x0A),造成数据损坏。 2. ...