Cannot output the text file and print the student result
1. Add new member information
2. Print member list
3. Exit
#include<iostream.h>
#include<fstream.h>
#include<dos.h>
#include<conio.h>
#include<stdlib.h>
#include<stdio.h>
#include<string.h>
#include<iomanip.h>
struct student
{
char Stdid[7];
char Stdname[30];
char Class[3];
char Position[30];
}p;
class group
{
public:
fstream f;
group();
void addrec();
void listrec();
void exits();
};
int main( )
{
int choice;
char v;
"textcolor(YELLOW)";
group g;
do
{
"gotoxy(15,2)";
cout<<"\n XXX Secondary School Student's Union"<<"\n";
"gotoxy(12,12)";
cout<<"\n 1. Add new member information";
"gotoxy(12,14)";
cout<<"\n 2. Print member list";
"gotoxy(12,16)";
cout<<"\n 3. Exit";
"gotoxy(12,25)";
cout<<"\n\n Please enter your choice: ";
cin>>choice;
"clrscr()";
switch(choice)
{
case 1:
g.addrec();
break;
case 2:
g.listrec();
break;
case 3:
g.exits();
exit(0);
default:
cout<<"\nPRESS THE SPECIFIED KEYS ONLY";
"delay(1500)";
break;
}
}
while(choice!=0);
}
group::group()
{
f.open("students.txt",ios::binary|ios::in|ios::out);
if(!f)
{
exits();
}
f.write((char*)&"temp",sizeof(student));//writes an the end of file, dont over-write previous data.
f.close();
}
void group::addrec( )
{
char ch;
f.seekp(0L,ios::end);
do
{
cout<<"\n<<TO RETURN THE MAIN MENU PRESS 'R' ADD INFORMATION PRESS 'N' >>:";
cin>>ch;
if(ch=='r'||ch=='R')
main();
cout<<"\nPlease enter the followings:"<<"\n";
cout<<"\nStudent Id:";
cin>>p.Stdid;
cout<<"\nStudent Name:";
cin>>p.Stdname;
cout<<"\nClass :";
cin>>p.Class;
cout<<"\nPostion:";
cin>>p.Position;
f.write((char*)&p,sizeof(p));
cout<<"\nAAre you sure to add new member information?(Y/N):";
cin>>ch;
cout<<"\n";
}
while(ch=='y'||ch=='Y');
}
void group::listrec()
{
int j=1,a,c=0;
f.seekg(0L,ios::beg);
cout<<"\nPrint the member list as followings:";
cout<<"\n\n\n\n "<<"Student Id"<<" "<<" Student Name"<<" "<<"Class"<<" "<<"Postion"<<"";
cout<<"\n\t ---------------------------------------";
while(f.read((char*)&p,sizeof(p)))
{
cout<<"\n";
{
cout<<endl<<"RECORD NO";"<<j++<<setw(8)<<p.Stdid<<setw(14)<<p.Stdname<<setw(9)<<p.Class<<setw(12)<<p.Postion";
c++;
}
}
f.clear();
if(c==0)
{
"gotoxy(10,10)";
cout<<"NO RECORD EXIT";
"gotoxy(10,12)";
cout<<"\n\nPRESS ANY KEY...";
getch();
}
else
{
cout<<endl<<endl<<"\n\n\n\n\tPRESS ANY KEY...";
getch();
}
}
void group::exits( )
{
f.close();
}
I can compile and run the program, but cannot output the text file and print the member list result. Anyone can advice the solution? Thanks.
2. Print member list
3. Exit
#include<iostream.h>
#include<fstream.h>
#include<dos.h>
#include<conio.h>
#include<stdlib.h>
#include<stdio.h>
#include<string.h>
#include<iomanip.h>
struct student
{
char Stdid[7];
char Stdname[30];
char Class[3];
char Position[30];
}p;
class group
{
public:
fstream f;
group();
void addrec();
void listrec();
void exits();
};
int main( )
{
int choice;
char v;
"textcolor(YELLOW)";
group g;
do
{
"gotoxy(15,2)";
cout<<"\n XXX Secondary School Student's Union"<<"\n";
"gotoxy(12,12)";
cout<<"\n 1. Add new member information";
"gotoxy(12,14)";
cout<<"\n 2. Print member list";
"gotoxy(12,16)";
cout<<"\n 3. Exit";
"gotoxy(12,25)";
cout<<"\n\n Please enter your choice: ";
cin>>choice;
"clrscr()";
switch(choice)
{
case 1:
g.addrec();
break;
case 2:
g.listrec();
break;
case 3:
g.exits();
exit(0);
default:
cout<<"\nPRESS THE SPECIFIED KEYS ONLY";
"delay(1500)";
break;
}
}
while(choice!=0);
}
group::group()
{
f.open("students.txt",ios::binary|ios::in|ios::out);
if(!f)
{
exits();
}
f.write((char*)&"temp",sizeof(student));//writes an the end of file, dont over-write previous data.
f.close();
}
void group::addrec( )
{
char ch;
f.seekp(0L,ios::end);
do
{
cout<<"\n<<TO RETURN THE MAIN MENU PRESS 'R' ADD INFORMATION PRESS 'N' >>:";
cin>>ch;
if(ch=='r'||ch=='R')
main();
cout<<"\nPlease enter the followings:"<<"\n";
cout<<"\nStudent Id:";
cin>>p.Stdid;
cout<<"\nStudent Name:";
cin>>p.Stdname;
cout<<"\nClass :";
cin>>p.Class;
cout<<"\nPostion:";
cin>>p.Position;
f.write((char*)&p,sizeof(p));
cout<<"\nAAre you sure to add new member information?(Y/N):";
cin>>ch;
cout<<"\n";
}
while(ch=='y'||ch=='Y');
}
void group::listrec()
{
int j=1,a,c=0;
f.seekg(0L,ios::beg);
cout<<"\nPrint the member list as followings:";
cout<<"\n\n\n\n "<<"Student Id"<<" "<<" Student Name"<<" "<<"Class"<<" "<<"Postion"<<"";
cout<<"\n\t ---------------------------------------";
while(f.read((char*)&p,sizeof(p)))
{
cout<<"\n";
{
cout<<endl<<"RECORD NO";"<<j++<<setw(8)<<p.Stdid<<setw(14)<<p.Stdname<<setw(9)<<p.Class<<setw(12)<<p.Postion";
c++;
}
}
f.clear();
if(c==0)
{
"gotoxy(10,10)";
cout<<"NO RECORD EXIT";
"gotoxy(10,12)";
cout<<"\n\nPRESS ANY KEY...";
getch();
}
else
{
cout<<endl<<endl<<"\n\n\n\n\tPRESS ANY KEY...";
getch();
}
}
void group::exits( )
{
f.close();
}
I can compile and run the program, but cannot output the text file and print the member list result. Anyone can advice the solution? Thanks.
Holy jesus please use the code tags, I can barely read this.
Also, in addrec( )
What's the point of that? You never set it back to the beginning when you start writing.
Also, in addrec( )
f.seekp(0L,ios::end);What's the point of that? You never set it back to the beginning when you start writing.
Actually, we never give full solutions around here.
What the heck are you doing? Of course nothing will print out because your stream is always closed when you do try to write. Similarly, nothing will be read for that same reason. You need to open your stream before you do any operations on it. You open your stream only once and that is in the constructor and that stream is later closed.
-Albatross
What the heck are you doing? Of course nothing will print out because your stream is always closed when you do try to write. Similarly, nothing will be read for that same reason. You need to open your stream before you do any operations on it. You open your stream only once and that is in the constructor and that stream is later closed.
-Albatross
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