Closed pahelp po sa c++ language

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pa tulong naman po sa c++ language kung paano dagdagan ng array function yung system po namin or queue

 

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#include<iostream.h>
#include<conio.h>
#include<fstream.h>
#include<string.h>
#include<stdlib.h>
#include<iomanip.h>

class lib
{
protected:
char name[25][25];
char wn[25][25];
char code[25][15];
char copy[25][15];

};

class fnublic lib
{
int z;
public:
void add_(void);
void delete_(void);
void plus(void);
void display_(void);
void initial(){z=0;}
void srch();
};

void fn :: add_(void) //To add a new book
{
int m,n,k;

clrscr();

fstream f1;
f1.open("book1.txt",ios:ut|ios::app);

cout<<"\n\nEnter the book name :";
cin>>name[z];
cout<<"Enter writter name :";
cin>>wn[z];
cout<<"Enter the book code :";
cin>>code[z];
cout<<"Enter the no. of copy :";
cin>>copy[z];

int i;

m=strlen(name[z]);
n=strlen(wn[z]);
k=strlen(code[z]);

f1.seekg(0,ios::end);
f1<<endl;

f1<<name[z];
for(i=0;i<26-m;i++)
f1<<"\ ";
f1 <<wn[z];
for(i=0;i<22-n;i++)
f1<<"\ ";
f1 <<code[z];
for(i=0;i<17-k;i++)
f1<<"\ ";
f1 <<copy[z];
f1.close();

z++;
}
void fn :: delete_(void) //To delete a copy of book from list
{
int i;

clrscr();

cout<<"\nPlease enter the book code:";
cin>>i;

fstream f2;
f2.open("book1.txt",ios::in|ios:ut|ios::nocreate);

f2.seekg(0);

char b[20];
int m,n,o;
char *l;

while(f2.eof()==0)
{
f2>>b;
f2>>b;
f2>>m;
f2>>l;

n=atoi(l);
o=strlen(l);

if(m==i)
{
f2.seekg(-o,ios::cur);

if (n>0)
{
n--;
f2<<n;
cout<<"\nOne copy of this book is deleted from list.";
getch();
break;
}
else
{
cout<<"Not available copy.";
break;
}
}
}
f2.close();

}

void fn :: plus(void) //To add a copy of book to list
{
int j;

clrscr();

cout<<"\nPlease enter the book code:";
cin>>j;

fstream f6;
f6.open("book1.txt",ios::in|ios:ut|ios::nocreate);

f6.seekg(0);

char c[30];
int e,r,t;
char *p;

while(f6.eof()==0)
{
f6>>c;
f6>>c;
f6>>r;
f6>>p;

e=atoi(p);
t=strlen(p);

if(r==j)
{
f6.seekg(-t,ios::cur);

if(e>=0)
{
e++;
f6<<e;
cout<<"\nOne copy of this book is added to list.";
getch();
break;
}
else
{
cout<<"Invalid book code.";
break;
}
}
}

f6.close();

}

void fn :: display_(void) //To show the book list
{
clrscr();

fstream f3;
f3.open("book1.txt",ios::in|ios::app);
f3.seekg(0);

char a;

cout<<"\n\n";
cout<<"\t*************** BOOK LIST ***************";
cout<<"\n\n";
cout<<"Bookname"<<setw(25)<<"Writter"<<setw(18)<<"Code"<<setw(17)<<"Copy"<<endl;
cout<<"--------"<<setw(25)<<"-------"<<setw(18)<<"----"<<setw(17)<<"----"<<endl;

while(f3)
{
f3.get(a);
cout<<a;
}
f3.close();
getch();
}

void fn :: srch () //To search a book with its code from list
{
int i,j,k=0;

clrscr();

cout<<"\nPlease enter the Book code: ";
cin>>j;

fstream f4;
f4.open("book1.txt",ios::in|ios::app);
f4.seekg(0);

char c[20],d[20];
int n,p;

while(f4.eof()==0)
{
f4>>c;
f4>>d;
f4>>n;
f4>>p;

if(n==j)
{
cout<<" Book name : "<<c<<endl;
cout<<" Writter name : "<<d<<endl;
cout<<" Book code : "<<n<<endl;
cout<<" Available copy : "<<p<<endl<<endl;
getch();
k++;
}
if(k==1)
break;
}

}

int main () //Main function
{
int i;

fn f;
f.initial();

clrscr();

while(1)
{
clrscr();

cout<<"\n\n***----- WELL COME TO LIBRARY MANAGEMENT PROGRAM -----***";
cout<<"\n\nWhat do you want to do?"<<endl;
cout<<"\n1: Add a new book to the list.";
cout<<"\n2: Delete a copy of book from list.";
cout<<"\n3: Add a copy of book to list.";
cout<<"\n4: See the book list.";
cout<<"\n5: Search a Book from list.";
cout<<"\n6: Exit ."<<endl;
cout<<"\nInput your choice:";
cin>>i;

switch(i)
{
case 1:
{
f.add_();
break;
}

case 2:
{
f.delete_();
break;
}

case 3:
{
f.plus();
break;
}

case 4:
{
f.display_();
break;
}

case 5:
{
f.srch();
break;
}

case 6:
{
cout<<"Thank you.";
break;
}
}

if (i==6)
break;
}

getch();
return 0;
}