#include <iostream>
#include <fstream>
using namespace std;
class Tercher
{
public:
string name = "";
int ID = 0;
char sex = 'm';
};
string name;
int ID;
char sex;
int main()
{
ofstream ofs("D:\\VisualStudio2022\\teacher.dat", ios::out | ios::binary);
if (!ofs)
{
cout << "文件打开失败" << endl;
return 0;
}
int n;
cout << "输入教师数量：";
cin >> n;
for (int i = 0; i < n; i++)
{
Tercher t;
cin >> name >> ID >> sex;
t = { name,ID,sex };
ofs.write((const char*)&t, sizeof(t));
}
ofs.close();
ifstream ifs("D:\\VisualStudio2022\\teacher.dat", ios::in | ios::binary);
if (!ifs.is_open())
{
cout << "文件打开失败" << endl;
return 0;
}
Tercher t;
for (int i = 0; i < n; i++)
{
ifs.read((char*)&t, sizeof(t));
cout << "名字：" << t.name << " " << "工号：" << t.ID << " " << "性别：" << sex << endl;
}
ifs.close();
return 0;
}
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
ofstream ofs;
ofs.open("D:\\VisualStudio2022\\M99.txt", ios::out);
if (!ofs)
{
cout << "文件打开失败" << endl;
return 0;
}
for (int i = 1; i <= 9; i++)
{
for (int j = 1; j <= i; j++)
ofs << j << " * " << i << " = " << j * i << " ";
ofs << endl;
}
ofs.close();
ifstream ifs;
ifs.open("D:\\VisualStudio2022\\M99.txt", ios::in);
if (!ifs)
{
cout << "文件打开失败" << endl;
return 0;
}
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
string word;
int main()
{
ofstream ofs;
ofs.open("D:\\VisualStudio2022\\Word.txt", ios::out);
if (!ofs)
{
cout << "文件打开失败" << endl;
return 0;
}
getline(cin, word);
ofs << word;
ofs.close();
ifstream ifs;
ifs.open("D:\\VisualStudio2022\\Word.txt", ios::in);
if (!ifs)
{
cout << "文件打开失败" << endl;
return 0;
}
int ans = 0;
char c;
while ((c = ifs.get())!=EOF)
{
if (c == ' ')
ans++;
}
ifs.close();
cout << "单词数量为：" << ans+1 << endl;
return 0;
}
char buff[1024];
while (ifs.getline(buff, sizeof(buff)))
{
cout << buff << endl;
}
ifs.close();
return 0;
}
