fstream 二进制文件读写
// Copy a file
#include <fstream> // std::ifstream, std::ofstream
int main () {
std::ifstream infile ("test.txt",std::ifstream::binary);
std::ofstream outfile ("new.txt",std::ofstream::binary);
// get size of file
infile.seekg (0,infile.end);
long size = infile.tellg();
infile.seekg (0);
// allocate memory for file content
char* buffer = new char[size];
// read content of infile
infile.read (buffer,size);
// write to outfile
outfile.write (buffer,size);
// release dynamically-allocated memory
delete[] buffer;
outfile.close();
infile.close();
return 0;
}
文本文件追加写入
record.hpp
class Record
{
public:
Record();
~Record();
bool OpenFile(std::string path);
bool Append(std::string str);
bool Close();
bool isOpen(){return opensts;};
private:
std::fstream fs;
bool opensts = false;
};
record.cpp
bool Record::OpenFile(std::string path)
{
fs.open(path, std::fstream::in | std::fstream::app);
opensts = fs.is_open();
return opensts;
}
bool Record::Append(std::string str)
{
if (opensts)
{
fs << str;
fs.flush();
return true;
}
return false;
}
bool Record::Close()
{
if (opensts)
{
fs.close();
return true;
}
return false;
}
