/***********************************
二进制文件数据的读取和写入
***********************************/
#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    int age,height,readAge,readHeight;
    cout<<"please input age and height:";
    cin>>age>>height;

    ofstream outBinaryFile("binary.abc",ios::binary|ios::app);
    if(outBinaryFile.fail())
    {
        cout<<"open file failed."<<endl;
        exit(0);
    }
    outBinaryFile.write(reinterpret_cast<char *>(&age),sizeof(age));
    outBinaryFile.write(reinterpret_cast<char *>(&height),sizeof(height));
    outBinaryFile.close();

    ifstream inBinaryFile("binary.abc",ios::binary);
    if(inBinaryFile.fail())
    {
        cout<<"open file failed."<<endl;
        exit(0);
    }
    inBinaryFile.seekg(-sizeof(int)*2,ios::end); //每次读文件，从文件末尾前移两个int字节，不知道对不对，请各位指点
    inBinaryFile.read(reinterpret_cast<char *>(&readAge),sizeof(readAge));
    inBinaryFile.read(reinterpret_cast<char *>(&readHeight),sizeof(readHeight));
    inBinaryFile.close();

    cout<<"age from file:"<<readAge<<endl
       <<"height from file:"<<readHeight<<endl;

    return 0;
}
输出的数值不对

应该输出19 110才对

std::ifstream::traits_type::off_type 这个是什么意思？
直接这么写有什么错误？    inBinaryFile.seekg(-sizeof(int)*2,ios::end);

[此贴子已经被作者于2023-10-5 15:06编辑过]

发现这样转一下结果就是对的，直接用右边的去替换a就不对！