课程设计——输出到TXT

#include "fstream.h"
struct student
{
 char name[20];
 int num;
 int age;
 char sex; 
};

int main()
{
 student stud[3]={"Li",1001,18,'f',"Fun",1002,19,'m',"Wang",1004,17,'f'};
 ofstream outfile("stud.dat",ios::binary);//打开文件我这是dat格式的，你可以用txt
 if(!outfile)
 {
  cerr<<"open error!"<<endl;
  return 0;
 }
 for(int i=0;i<3;i++)
  outfile.write((char *)&stud[i],sizeof(stud[i]));//写数据到文件中
 outfile.close();//关闭流
    ifstream infile("stud.dat",ios::binary);//下面是 从 文件中读数据出来。
 if(!infile)
 {
  cerr<<"open error!"<<endl;
  return 0;
 }
 for(int j=0;j<3;j++)
 infile.read((char *)&stud[j],sizeof(stud[j]));
 for (int k=0;k<3;k++)
 {
  cout<<"NO."<<k+1<<endl;
  cout<<"name:"<<stud[k].name<<endl;
  cout<<"num:"<<stud[k].num<<endl;
  cout<<"age:"<<stud[k].age<<endl;
  cout<<"sex:"<<stud[k].sex<<endl;
 }
 return 0; 
}