#include<conio.h>
#include<iostream.h>
#include<stdlib.h>
#include<iomanip.h>
#include<fstream.h>
struct stud
{
char Name[ 20 ],Tel[ 10 ];
int Age;
int Sex;
};

char*fname() {char*s=new char[ 40 ];
cout<<"Enter FileName:"; cin>>s;return s;}

void save (fstream&x, stud y) { x<<y.Age<<' '<<y.Sex<<' ';}
void save (char fn[], stud x[], int n)
{int i; fstream f;
f.open (fn, ios::out);
f<<n<<' ';
for (i= 0 ;i<n;i++)
save (f, x[i]);f.close();}

void load (fstream&x, stud&y){x>>y.Age>>y.Sex>>y.Tel;}

void load (char fn[], stud x[], int&n)
{int i;fstream f;
f.open (fn, ios::in);
f>>n;
for (i= 0 ; i<n;i++)
load(f,x[i]);
f.close();}

void input (stud&record)
{
cout<<"input Name:";cin>>record.Name;
cout<<"input Age:";cin>>record.Age;
cout<<"input Sex:";
cin>>record.Sex;

//record.Sex=(sex=='m'||sex=='M')?1:0;// это преподу не понравилось и он убрал
cout<<"input Tel:";cin>>record.Tel;
}

void output(stud& record)
{
cout<<record.Name<<'\t';
cout<<record.Age<<'\t';
cout<<record.Sex<<'\t';
cout<<record.Tel<<endl;
}

void output_all(stud records[], int cout)
{
for (int i= 0 ;i<cout;i++)
output(records[i]);
}

void the_tel(stud records[], int count)
{
char new_tel[ 3 ];
cout<<"new_tel=";
cin>>new_tel;
int flag= 0 ;
for (int i= 0 ;i<count;i++)
{
flag= 1 ;
for (int j= 0 ;j< 3 ;j++)
if (new_tel[j]!=records[i].Tel[j])
{
flag= 0 ;
break;
}
if(flag)
 output(records[i]);
 }
}

void the_name(stud records[], int count)
{
 char new_bukva;
 cout<<"new_bukva=";
 cin>>new_bukva;

 for(int i= 0 ;i<count; i++)
 {
if(new_bukva==records[i].Name[ 1 ])
output(records[i]);
}
}

char menu()
{
char b;
cout<<"1-new record"<<endl;
cout<<"2-show all record"<<endl;
cout<<"3-the_telefon"<<endl;
cout<<"4-the_name"<<endl;
cout<<"5-Exit"<<endl;
cout<<"6-Save"<<endl;
cout<<"7-Load"<<endl;

cout<<"input:";
cin>>b;
return b;
}

int main()
{
stud table[ 20 ];
int cur= 0 ;
char key= 0 ;
clrscr();
for(;;)
{
key=menu();
clrscr();
switch (key)
{
case'1':
if (cur< 20 )
{
input(table[cur]);
cur++;
}
else
cout<<"error:input max record"<<endl;
break;
case'2':
output_all(table, cur);
break;
case'3':
the_tel(table, cur);
break;
case'4':
the_name(table, cur);
break;
case'5':
return  0 ;
  }
 }
}

key=menu();
clrscr();
switch (key)

if(!in.good()) throw std::ios_base::failure("Wrong sex format!");
     if(in == cin) cout<<"input Tel:";    in>>record.Tel;

n = max_count<n ? max_count : n;

#include<iostream.h>
#include<stdlib.h>
#include<string.h>
#include<iomanip.h>
#include<fstream.h>
struct stud
{
     char Name[ 20 ],Tel[ 10 ];
     int Age;
     int Sex;
     friend ostream & operator << (ostream& out, stud& record);
     friend istream & operator >> (istream& out, stud& record);
};

istream& operator >>(istream& in, stud&record)
{
     if(in == cin) cout<<"input Name:";   in>>record.Name;
     if(in == cin) cout<<"input Age:";    in>>record.Age;
     if(!in.good()) throw std::ios_base::failure("Wrong age format!");
     if(in == cin) cout<<"input Sex:";    in>>record.Sex;
     if(!in.good()) throw std::ios_base::failure("Wrong sex format!");
     if(in == cin) cout<<"input Tel:";    in>>record.Tel;
     return in;
}

ostream & operator <<(ostream & out, stud& record)
{
     out<<record.Name<<'\t';
     out<<record.Age<<'\t';
     out<<record.Sex<<'\t';
     out<<record.Tel<<endl;
     return out;
}

void output_all(stud records[], int count)
{
     for (int i= 0 ;i<count;i++)
         cout << records[i];
}

void the_tel(stud records[], int count)
{
     char new_tel[ 14 ];
     cout<<"new_tel=";
     cin >>new_tel;
     for (int i= 0 ;i<count;i++)
         if(! strncmp(new_tel, records[i].Tel, strlen(new_tel)) )
             cout << records[i];
}

void the_name(stud records[], int count)
{
     char new_bukva;
     cout<<"new_bukva="; cin>>new_bukva;
     for(int i= 0 ;i<count; i++)
         if(new_bukva==records[i].Name[ 0 ])
             cout << records[i];
}
void the_save(stud records[], int count){
     ofstream fos("records.dat");
     fos << count << endl;
     for(int i= 0 ;i<count;i++)
       fos << records[i];
     fos.close();
}
void the_load(stud records[], int max_count, int* count){
     fstream fis("records.dat", fstream::in);
     int n;
     fis >> n;
     cout << n << endl;
     n = max_count<n ? max_count : n;
     for(int i= 0 ;i<n;i++){
       cout << "Reading " << i << "\n";
       fis >> records[i];
     }
     fis.close();
     *count = n;
}
char menu()
{
     char b;
     cout<<"1-new record"<<endl;
     cout<<"2-show all record"<<endl;
     cout<<"3-the_telefon"<<endl;
     cout<<"4-the_name"<<endl;
     cout<<"5-Exit"<<endl;
     cout<<"6-Save"<<endl;
     cout<<"7-Load"<<endl;

     cout<<"input:";
     do {
         cin.sync();
         cin>>b;
     }while( ! (b>='1' && b<='7') );
     return b;
}

int main()
{
     stud table[ 20 ];
     int cur= 0 ;
     char key= 0 ;
     for(;;)
     {
         key=menu();
         switch (key)
         {
         case'1':
             if (cur< 20 )
             {
                 try{
                         cin >> table[cur];
                         cur++;
                 }catch(std::ios_base::failure exept){
                         cin.sync();
                         cin.clear();
                         cout << "Caught exception!\n";
			cout << exept.what() << endl;
                 }
             }
             else
                 cout<<"error:input max record"<<endl;
             break;
         case'2':
             output_all(table, cur);
             break;
         case'3':
             the_tel(table, cur);
             break;
         case'4':
             the_name(table, cur);
             break;
         case '5':
             exit( 0 );
         case '6':
             the_save(table, cur);break;
         case '7':
             the_load(table,  20 , &cur); break;
         }
     }
}

while(!kbhit());

printf("%s\t%d\t%c\t%s\r\n",record.Name,record.Age,record.Sex,record.Tel);

printf("input Name: ");
scanf("%s",record.Name);
printf("input Age:");
scanf("%d",&(record.Age));
printf("input Sex:");
record.Sex=getche();
printf("\r\ninput Tel:");
scanf("%s",record.Tel);