P269 5

#include <iostream> #include <fstream> using namespace std; struct staff {int num;  char name[20]; int age;  double pay; };  int main()  {staff staf[7]={2101,"Li",34,1203,2104,"Wang",23,674.5,2108,"Fun",54,778,3006,"Xue",45,476.5,5101,"Ling",39,656.6},staf1; fstream iofile("staff.dat",ios::in|ios::out|ios::binary); if(!iofile)  {cerr<<"open error!"<<endl; abort(); }  int i,m,num;  cout<<"Five staff :"<<endl; for(i=0;i<5;i++)  {cout<<staf[i].num<<" "<<staf[i].name<<" "<<staf[i].age<<" "<<staf[i].pay<<endl; iofile.write((char *)&staf[i],sizeof(staf[i]));} cout<<"please input data you want insert:"<<endl; for(i=0;i<2;i++)  {cin>>staf1.num>>staf1.name>>staf1.age>>staf1.pay; iofile.seekp(0,ios::end);  iofile.write((char *)&staf1,sizeof(staf1));} iofile.seekg(0,ios::beg); for(i=0;i<7;i++)  {iofile.read((char *)&staf[i],sizeof(staf[i]));  cout<<staf[i].num<<" "<<staf[i].name<<" "<<staf[i].age<<" "<<staf[i].pay<<endl; }  bool find;  cout<<"enter number you want search,enter 0 to stop.";  cin>>num; while(num) {find=false;  iofile.seekg(0,ios::beg); for(i=0;i<7;i++)  {iofile.read((char *)&staf[i],sizeof(staf[i])); if(num==staf[i].num) {m=iofile.tellg();  cout<<num<<" is No."<<m/sizeof(staf1)<<endl;  cout<<staf[i].num<<" "<<staf[i].name<<" "<<staf[i].age<<" "<<staf[i].pay<<endl; find=true; break; } }  if(!find)  cout<<"can't find "<<num<<endl;  cout<<"enter number you want search,enter 0 to stop."; cin>>num; }  iofile.close(); return 0; }