1. 读取
#include <iostream>
#include <fstream>
using namespace std;
class CStudent
{
public:
char szName[20];
int age;
};
int main()
{
CStudent s;
ifstream inFile("students.dat", ios::in | ios::binary); //二进制读方式打开
if (!inFile)
{
cout << "error" << endl;
return 0;
}
while (inFile.read((char *)&s, sizeof(s)))
{ //一直读到文件结束
cout << s.szName << " " << s.age << endl;
}
inFile.close();
return 0;
}
2. 写入
#include <iostream>
#include <fstream>
using namespace std;
class CStudent
{
public:
char szName[20];
int age;
};
int main()
{
CStudent s;
ofstream outFile("students.dat", ios::out | ios::binary);
while (cin >> s.szName >> s.age)
outFile.write((char *)&s, sizeof(s));
outFile.close();
return 0;
}
