这就是问题所在。如何写入和读取内部带有std::vector的二进制文件?
我是这样想的:
//============ WRITING A VECTOR INTO A FILE ================
const int DIM = 6;
int array[DIM] = {1,2,3,4,5,6};
std::vector<int> myVector(array, array + DIM);
ofstream FILE(Path, ios::out | ofstream::binary);
FILE.write(reinterpret_cast<const char *>(&myVector), sizeof(vector) * 6);
//===========================================================
但是我不知道怎么读这个向量。因为我认为以下内容是正确的,但事实并非如此:
ifstream FILE(Path, ios::in | ifstream::binary);
FILE.read(reinterpret_cast<const char *>(&myVector), sizeof(vector) * 6);
那么,如何执行该操作呢?
发布于 2012-09-11 23:07:23
尝试使用ostream_iterator
/ostreambuf_iterator
、istream_iterator
/istreambuf_iterator
和STL copy
方法:
#include <algorithm>
#include <iostream>
#include <iterator>
#include <vector>
#include <fstream> // looks like we need this too (edit by π)
std::string path("/some/path/here");
const int DIM = 6;
int array[DIM] = {1,2,3,4,5,6};
std::vector<int> myVector(array, array + DIM);
std::vector<int> newVector;
std::ofstream FILE(path, std::ios::out | std::ofstream::binary);
std::copy(myVector.begin(), myVector.end(), std::ostreambuf_iterator<char>(FILE));
std::ifstream INFILE(path, std::ios::in | std::ifstream::binary);
std::istreambuf_iterator iter(INFILE);
std::copy(iter.begin(), iter.end(), std::back_inserter(newVector));
发布于 2012-09-11 22:58:31
使用boost::serialization
。
如果你不想使用boost
-写大小和vector
。
size_t sz = myVector.size();
FILE.write(reinterpret_cast<const char*>(&sz), sizeof(sz));
FILE.write(reinterpret_cast<const char*>(&myVector[0]), sz * sizeof(myVector[0]));
发布于 2012-09-11 22:56:37
您可以使用
#include <boost/serialization/vector.hpp>
序列化你的向量。点击这里阅读教程:http://www.boost.org/libs/serialization/doc/tutorial.html#stl `
https://stackoverflow.com/questions/12372531
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