利用fstream写入结构体(二进制写入)

typedef struct s_Student

{

        string name;

        int age;

        int tel;

}Student;

Student st;

st.name="xiaoming";

st.age=18;

tel=1234567;

fstream fs;

fs("test.txt",ios::out | ios::binary);//binary二进制输出

if(fs)

{

        fs.write(reinterpret_cast<char*>(&st), sizeof(st));

//或者fs.write((char*)(&st),sizeof(st));

        fs.close();

}