please correct these 6 C++ errors

Akshay S Danthi (6)
as content size is limited to 9000 characters... i have posted the source code in:

http://www.mediafire.com/view/?8cn2skrvevcr4dd
ajh32 (163)
Why don't you just post the snippets of code that are causing you problems?
Akshay S Danthi (6)
man, i tried now... im a beginner... please try my code on that and find out... this is my project...i have grades for this... PLEASE !!
Last edited on
ajh32 (163)
I'm not going to click on a link I don't know what is behind it do I. You should be able to just paste the snippets of code that is causing you a problem.
theranga (100)
the link's legit, but copy-paste would still be better
Akshay S Danthi (6)
ok i'll post it into 2 parts...
#include<iostream.h>
#include<fstream.h>
#include<conio.h>
#include<process.h>
#include<stdio.h>
#include<string.h>
int access=0; // for accessing data modifier functions
int report_s=0;
int report_u=0;
class element
{
int at_no;
float mass_no;
char name[15];
char symbol[4];
int group,period; //for displaying the table
public:

void input()
{
cout<<"enter elements name \n";
gets(name);
cout<<"enter its symbol \n";
gets(symbol);
cout<<"enter its atomic number \n";
cin>>at_no;
cout<<"enter its mass number\n";
cin>>mass_no;
cout<<"enter its group number\n";
cin>>group;
cout<<"enter its period number\n";
cin>>period;
}
void output()
{
cout<<"elements name:"<<name<<"\n";
cout<<"symbol:"<<symbol<<"\n";
cout<<"atomic number:"<<at_no<<"\n";
cout<<"mass number:"<<mass_no<<"\n";
}
char*sym()
{return symbol;}
char *nam()
{return name;}
int atno()
{return mass_no;}
int ret_period()
{return group;}
}e;

struct user
{
char name[20];
private:
char password[10];
public:
void input()
{
cout<<"\nenter name";
gets(name);
cout<<"\nenter password:\n";
gets(password);
}
char*getpassw()
{return password;}
void inpass()
{
cout<<"enter password\n";
gets(password);
}
}
u;
void report(element,char);
void report();
void login()
{
access=0;
int i;
char ch;
do
{
clrscr();
cout<<"\t\t\t\tlogin menu\n\n";
cout<<"enter type of user:\n\n";
cout<<"\t\t1.new user\n";
cout<<"\t\t2.existing user\n";
cout<<"\t\t3.quit\n\n\n";
cout<<"your choice";
cin>>ch;
switch(ch)
{
case '1':
{
int presence=0; //for checking presence of record (user)
u.input();
user b;
ifstream fin("users.dat",ios::binary|ios::in);
if(!fin)
cout<<"error";
while(!(fin.eof()))
{
if(fin.eof())
break;
fin.read((char*)&b,sizeof(user));
if(strcmp(b.name,u.name)==0)
{
cout<<"name exists, try again";
getch();
fin.close();
presence=1; //presence is true
break;
} // end of if
break; // break for case 1
} // close of case 1
case '2':
{
int i=0;
u.input();
user b;
ifstream fin("users.dat",ios::binary|ios::in);
if(!fin)
cout<<"error";
while(!(fin.eof()))
{
if(fin.eof())
break;
fin.read((char*)&b,sizeof(user));
if((strcmp(b.name,u.name)==0)&&(strcmp(b.getpassw(),u.getpassw())==0))
{
if(strcmp(u.name,"administrator")==0)
{
fin.close();
access=1;
return;
} //close of inner if
fin.close();
return;
} //close of if
if(strcmp(u.name,b.name)==0)
{
for(i=0;i<3;)
{
cout<<"enter the correct password \n";
u.inpass();
if(strcmp(u.getpassw(),b.getpassw())==0)
{
if(strcmp(u.name,"administrator")==0)
access=1;
return;
}
else
i++;
} // close of loop
} // close of if
if(i>=3)
{
cout<<"invalid password. program will now terminate";
fin.close();
getch();
exit(0);
}
} // close of while
cout<<"user not found";
getch();
break;
} //close of case 2
case '3':
{
clrscr();
char opt;
cout<<"are you sure? (y/n) \n";
cin>>opt;
if(opt=='y')
{
clrscr();
gotoxy(33,13);
cout<<"thank you";
getch();
exit(0);
}
break;
}
default:
{
cout<<"enter a valid option";
getch();
} // close of switch
} while(1); //close of do while
} // close of function
void disp_period()
{
clrscr();
ifstream fin("period.dat",ios::binary|ios::in);
if(!fin)
cout<<"error";
cout<<"\t\t\t the modern periodic table";
while(!fin.eof())
{
if(fin.eof())
break;
fin.read((char*)&e,sizeof(element));
gotoxy(4*e.ret_group()),(e.ret_period+5));
cout<<e.sym();
}
fin.close();
getch();
}
void search()
{
char ch;
int result=0; //for checking success of search
do
{
result=0;
clrscr();
cout<<"\t\t\tthe periodic table\n\n";
cout<<"\t\tsearch modes available \n\n";
cout<<"1.element symbol\n";
cout<<"2.element name\n";
cout<<"3.atomic number\n";
cout<<"4.return to main memory\n";
cout<<"your choice:";
cin>>ch;
ifstream a("period.dat",ios::binary);
if(!a)
cout<<"error";
switch(ch)
{
case '1':
{
char symbol[3];
cout<<"enter the elements symbol\n";
gets(symbol);
while(!(a.eof()))
{
if((a.eof()))
break;
a.read((char*)&e,sizeof(element));
if(strcmpi(e.sym(),symbol)==0)
{
e.output();
report(e,'s'); //for sending result of search to report()
getch();
result=1;
break;
}
}
a.close();
break;
}
case '2':
{
char name[20];
cout<<"enter the elements name\n";
gets(name);
while(!a.eof())
{
if(a.eof())
break;
a.read((char*)&e,sizeof(element));
if(strcmpi(e.nam(),name)==0)
{
e.output();
report(e,'s');
getch();
result=1;
break;
}
}
a.close();
break;
}
case'3':
{
int atno;
cout<<"enter the elements atomic no.\n";
cin>>atno;
while(!(a.eof()))
{
if((a.eof()))
break;
a.read((char*)&e,sizeof(element));
if(e.atno()==atno)
{
e.output();
report(e,'s');
getch();
result=1;
break;
}
}
a.close();
break;
}
case '4' : return; //no need break as the control is passed on,
//fall through does not occur
default:
{
cout<<"enter a valid option";
getch();
}
}
if(!result)
{
cout<<"sorry, no entry found";
getch();
}
}while(1);
}
void period_det()
{
int presence; // for checking presence of element in database
char ch;
do
{
presence=0;
clrscr();
cout<<"\t\tperiodic table details \n\n";
cout<<"1. add element \n";
cout<<"2. modify element\n";
cout<<"3. display periodic table\n";
cout<<"4. return to main menu\n";
cout<<"enter your choice : ";
cin>>ch;
Akshay S Danthi (6)
switch(ch)
{
case '1' :
{
if(access)
{
element e3;
e.input();
ifstream a("period.dat",ios::binary);
if(!a)
cout<<"error";
a.seekg(0);
while(!a.eof())
{
if(a.eof())
break;
a.read((char*)&e3,sizeof(element));
if(strcmpi(e3.sym(),e.sym())==0) || (strcmpi(e3.nam(),e.nam())==0) || (e3.atno()==e.atno()) || ((e3.ret_period))==e.ret_period())&&(e3.ret_group()==e.ret_group())) || (e3.massno()==e.massno())
{e3.output();presence=1;break;}
}
a.close();
if(!presence)
{
ofstream b("period.dat",ios::binary|ios::app);
if(!b)
cout<<"error";
b.write((char*)&e,sizeof(element));
cout<<"element added\n";
getch();
b.close();
report(e,'u');
}
else
{
cout<<"element already present";
getch();
}
break;
}
else
{
clrscr();
cout<<"access denied";
getch();
break;
}
}
case '2' :
{
if(access)
{
int result=0;
char ele_name[20];
cout<<"enter name of element to be modified\n";
gets(ele_name);
fstream f("period.dat",ios::binary|ios::in|ios::out);
if(!f)
cout<<"error";
f.seekg(0);
while(!f.eof())
{
if(f.eof())
break;
f.read((char*)&e,sizeof(element));
if(strcmpi(ele_name,e.nam())==0)
{
result=1;
char choice;
e.output();
cout<<"do you want to modify this record(y/n)";
cin>>ch;
if(ch=='y'||ch=='y')
{
f.seekp(f.tellg()-(sizeof(element)));
e.input();
ifstream g("period.dat",ios::binary);
if(!g)
cout<<"error";
element h;
int unique =1;
while(!g.eof())
{
if(g.eof())
break;
g.read((char*)&h,sizeof(element));
if((strcmpi(h.sym(),e.sym())==0) || (strcmpi(h.nam(),e.nam())==0) || (h.atno()==e.atno())
|| (h.ret_period()==e.ret_period()0&&(h.ret_group()==e.ret_group())) || (h.massno()==e.massno()))
{unique=0;
cout<<"element with modified data exists\n";
h.output();
getch();
break;
}
}
if(unique)
{f.write((char*)&e,sizeof(element));
report(e,'u');
cout<<"record edited";
getch();
}
break;
}
}
}
if(!result())
cout<<"no such record found";
getch();
f.close();
break;
}
else {
clrscr();
cout<<"access denied";
getch();
break;
}
}
case '3':
{
disp_period();
break;
}
case '4':
{
return;
}
default:
cout<<"enter a valid option";
getch();
}
}while(1);
}
void report(element e,char type)
{
if(type=='s')
{
report_s=1;
ofstream fout("reportsearch.dat",ios::binary|ios::app);
if(!fout)
cout<<"error";
else
fout.write((char*)&e,sizeof(element));
fout.close();
}
}
void report()
{
ifstream fin("reportsearch.dat",ios::binary);
if(!fin)
cout<<"error";
else
{
if(report_s)
{
clrscr();
cout<<"\tsearch report\n";
while(!fin.eof())
{
fin.read((char*)&e,sizeof(element));
if(fin.eof())
break;
e.output();
getch();
}
fin.close();
cout<<"end of search report";
getch();
}
else
{
clrscr();
cout<<"no search report found\n";
getch();
{
if(access)
{
if(report_u)
{
ifstream fin("reportupdate.dat",ios::binary);
if(!fin)
cout<<"error";
else
{
clrscr();
cout<<"\tupdate report\n";
while(!fin.eof())
{
fin.read((char*)&e,sizeof(element));
if(fin.eof())
break;
e.output();
getch();
}
fin.close();
cout<<"end of update report";
getch();
}
}
else {
clrscr();
cout<<"no update report found";
getch();
}
}
}
}
void main()
{
ofstream z("reportsearch.dat",ios::binary|ios::trunc);
if(!z)
cout<<"error";
z.close();
ofstream y("reportupdate.dat",ios::binary|ios::trunc);
if(!y)
cout<<"error";
y.close();
clrscr();
highvideo();
char ch;
gotoxy(25,12);
highvideo();
cout<<"welcome to the periodic table\n";
getch();
login();
do
{
clrscr();
cout<<"\t"<<"\t"<<"the periodic table\n\n";
cout<<"1. periodic table details\n";
cout<<"2. search for element \n";
cout<<"3. report\n";
cout<<"4.switch user\n";
cout<<"5. quit\n";
cout<<" enter you choice";
cin>>ch;
switch(ch)
{
case '1': period_det(); break;
case '2': search(); break;
case '3': report(); break;
case '4': login(); break;
case '5': clrscr();
char opt;
cout<<"are you sure?? (y/n) \n";
cin>>opt;
if(opt=='y')
{
clrscr();
gotoxy(33,13);
cout<<"thank you";
getch();
exit(0);
}
break;
default:cout<<"enter a valid option";
getch();
}
}while(1);
}
ajh32 (163)
So where are the errors located and what errors do you get?

Would make it easier to read if you put the code inside code blocks.
Akshay S Danthi (6)
it says content too long for code blocks... :(
Last edited on
ajh32 (163)
To start of you need to change the first two includes to:

1
2
 
 #include <iostream>	
 #include<fstream>


Then prefix each of the std library functions you are using with std:: i.e.:

 
 
std::cout ...


Would be advisable if you indented your code, although this maybe due to pasting code into message.

I'm still looking...
Akshay S Danthi (6)
no, please correct the braces first..can you? :/
Kart (58)
http://www.cplusplus.com/forum/articles/42672/

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#include<iostream.h>
#include<fstream.h>
#include<conio.h>
#include<process.h>
#include<stdio.h>
#include<string.h>
int access=0; // for accessing data modifier functions
int report_s=0;
int report_u=0;
class element
{
int at_no;
float mass_no;
char name[15];
char symbol[4];
int group,period; //for displaying the table
public:

void input()
{
cout<<"enter elements name \n";
gets(name);
cout<<"enter its symbol \n";
gets(symbol);
cout<<"enter its atomic number \n";
cin>>at_no;
cout<<"enter its mass number\n";
cin>>mass_no;
cout<<"enter its group number\n";
cin>>group;
cout<<"enter its period number\n";
cin>>period;
}
void output()
{
cout<<"elements name:"<<name<<"\n";
cout<<"symbol:"<<symbol<<"\n";
cout<<"atomic number:"<<at_no<<"\n";
cout<<"mass number:"<<mass_no<<"\n";
}
char*sym()
{return symbol;}
char *nam()
{return name;}
int atno()
{return mass_no;}
int ret_period()
{return group;}
}e;

struct user
{ 
char name[20];
private:
char password[10];
public:
void input()
{
cout<<"\nenter name";
gets(name);
cout<<"\nenter password:\n";
gets(password);
}
char*getpassw()
{return password;}
void inpass()
{
cout<<"enter password\n";
gets(password);
}
}
u;
void report(element,char);
void report();
void login()
{
access=0;
int i;
char ch;
do
{
clrscr();
cout<<"\t\t\t\tlogin menu\n\n";
cout<<"enter type of user:\n\n";
cout<<"\t\t1.new user\n";
cout<<"\t\t2.existing user\n";
cout<<"\t\t3.quit\n\n\n";
cout<<"your choice";
cin>>ch;
switch(ch)
{
case '1':
{
int presence=0; //for checking presence of record (user)
u.input();
user b;
ifstream fin("users.dat",ios::binary|ios::in);
if(!fin)
cout<<"error";
while(!(fin.eof()))
{
if(fin.eof())
break;
fin.read((char*)&b,sizeof(user));
if(strcmp(b.name,u.name)==0)
{
cout<<"name exists, try again";
getch();
fin.close();
presence=1; //presence is true
break;
} // end of if
break; // break for case 1
} // close of case 1
case '2':
{
int i=0;
u.input();
user b;
ifstream fin("users.dat",ios::binary|ios::in);
if(!fin)
cout<<"error";
while(!(fin.eof()))
{
if(fin.eof())
break;
fin.read((char*)&b,sizeof(user));
if((strcmp(b.name,u.name)==0)&&(strcmp(b.getpassw(),u.getpassw())==0))
{
if(strcmp(u.name,"administrator")==0)
{
fin.close();
access=1;
return;
} //close of inner if
fin.close();
return;
} //close of if
if(strcmp(u.name,b.name)==0)
{
for(i=0;i<3;)
{
cout<<"enter the correct password \n";
u.inpass();
if(strcmp(u.getpassw(),b.getpassw())==0)
{
if(strcmp(u.name,"administrator")==0)
access=1;
return;
}
else
i++;
} // close of loop
} // close of if
if(i>=3)
{
cout<<"invalid password. program will now terminate";
fin.close();
getch();
exit(0);
}
} // close of while
cout<<"user not found";
getch();
break;
} //close of case 2
case '3':
{
clrscr();
char opt;
cout<<"are you sure? (y/n) \n";
cin>>opt;
if(opt=='y')
{
clrscr();
gotoxy(33,13);
cout<<"thank you";
getch();
exit(0);
}
break;
}
default:
{
cout<<"enter a valid option";
getch();
} // close of switch
} while(1); //close of do while
} // close of function
void disp_period()
{
clrscr();
ifstream fin("period.dat",ios::binary|ios::in);
if(!fin)
cout<<"error";
cout<<"\t\t\t the modern periodic table";
while(!fin.eof())
{
if(fin.eof())
break;
fin.read((char*)&e,sizeof(element));
gotoxy(4*e.ret_group()),(e.ret_period+5));
cout<<e.sym();
}
fin.close();
getch();
}
void search()
{
char ch;
int result=0; //for checking success of search
do
{
result=0;
clrscr();
cout<<"\t\t\tthe periodic table\n\n";
cout<<"\t\tsearch modes available \n\n";
cout<<"1.element symbol\n";
cout<<"2.element name\n";
cout<<"3.atomic number\n";
cout<<"4.return to main memory\n";
cout<<"your choice:";
cin>>ch;
ifstream a("period.dat",ios::binary);
if(!a)
cout<<"error";
switch(ch)
{
case '1':
{
char symbol[3];
cout<<"enter the elements symbol\n";
gets(symbol);
while(!(a.eof()))
{
if((a.eof()))
break;
a.read((char*)&e,sizeof(element));
if(strcmpi(e.sym(),symbol)==0)
{
e.output();
report(e,'s'); //for sending result of search to report()
getch();
result=1;
break;
}
}
a.close();
break;
}
case '2':
{
char name[20];
cout<<"enter the elements name\n";
gets(name);
while(!a.eof())
{
if(a.eof())
break;
a.read((char*)&e,sizeof(element));
if(strcmpi(e.nam(),name)==0)
{
e.output();
report(e,'s');
getch();
result=1;
break;
}
}
a.close();
break;
}
case'3':
{
int atno;
cout<<"enter the elements atomic no.\n";
cin>>atno;
while(!(a.eof()))
{
if((a.eof()))
break;
a.read((char*)&e,sizeof(element));
if(e.atno()==atno)
{
e.output();
report(e,'s');
getch();
result=1;
break;
}
}
a.close();
break;
}
case '4' : return; //no need break as the control is passed on,
//fall through does not occur
default:
{
cout<<"enter a valid option";
getch();
}
}
if(!result)
{
cout<<"sorry, no entry found";
getch();
}
}while(1);
}
void period_det()
{
int presence; // for checking presence of element in database
char ch;
do
{
presence=0;
clrscr();
cout<<"\t\tperiodic table details \n\n";
cout<<"1. add element \n";
cout<<"2. modify element\n";
cout<<"3. display periodic table\n";
cout<<"4. return to main menu\n";
cout<<"enter your choice : ";
cin>>ch;
Kart (58) 
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switch(ch)
{
case '1' :
{
if(access)
{
element e3;
e.input();
ifstream a("period.dat",ios::binary);
if(!a)
cout<<"error";
a.seekg(0);
while(!a.eof())
{
if(a.eof())
break;
a.read((char*)&e3,sizeof(element));
if(strcmpi(e3.sym(),e.sym())==0) || (strcmpi(e3.nam(),e.nam())==0) || (e3.atno()==e.atno()) || ((e3.ret_period))==e.ret_period())&&(e3.ret_group()==e.ret_group())) || (e3.massno()==e.massno())
{e3.output();presence=1;break;}
}
a.close();
if(!presence)
{
ofstream b("period.dat",ios::binary|ios::app);
if(!b)
cout<<"error";
b.write((char*)&e,sizeof(element));
cout<<"element added\n";
getch();
b.close();
report(e,'u');
}
else
{
cout<<"element already present";
getch();
}
break;
}
else
{
clrscr();
cout<<"access denied";
getch();
break;
}
}
case '2' :
{
if(access)
{
int result=0;
char ele_name[20];
cout<<"enter name of element to be modified\n";
gets(ele_name);
fstream f("period.dat",ios::binary|ios::in|ios::out);
if(!f)
cout<<"error";
f.seekg(0);
while(!f.eof())
{
if(f.eof())
break;
f.read((char*)&e,sizeof(element));
if(strcmpi(ele_name,e.nam())==0)
{
result=1;
char choice;
e.output();
cout<<"do you want to modify this record(y/n)";
cin>>ch;
if(ch=='y'||ch=='y')
{
f.seekp(f.tellg()-(sizeof(element)));
e.input();
ifstream g("period.dat",ios::binary);
if(!g)
cout<<"error";
element h;
int unique =1;
while(!g.eof())
{
if(g.eof())
break;
g.read((char*)&h,sizeof(element));
if((strcmpi(h.sym(),e.sym())==0) || (strcmpi(h.nam(),e.nam())==0) || (h.atno()==e.atno())
|| (h.ret_period()==e.ret_period()0&&(h.ret_group()==e.ret_group())) || (h.massno()==e.massno()))
{unique=0;
cout<<"element with modified data exists\n";
h.output();
getch();
break;
}
}
if(unique)
{f.write((char*)&e,sizeof(element));
report(e,'u');
cout<<"record edited";
getch();
}
break;
}
}
}
if(!result())
cout<<"no such record found";
getch();
f.close();
break;
}
else {
clrscr();
cout<<"access denied";
getch();
break;
}
}
case '3':
{
disp_period();
break;
}
case '4':
{
return;
}
default:
cout<<"enter a valid option";
getch();
}
}while(1);
}
void report(element e,char type)
{
if(type=='s')
{
report_s=1;
ofstream fout("reportsearch.dat",ios::binary|ios::app);
if(!fout)
cout<<"error";
else
fout.write((char*)&e,sizeof(element));
fout.close();
}
}
void report()
{
ifstream fin("reportsearch.dat",ios::binary);
if(!fin)
cout<<"error";
else
{
if(report_s)
{
clrscr();
cout<<"\tsearch report\n";
while(!fin.eof())
{
fin.read((char*)&e,sizeof(element));
if(fin.eof())
break;
e.output();
getch();
}
fin.close();
cout<<"end of search report";
getch();
}
else
{
clrscr();
cout<<"no search report found\n";
getch();
{
if(access)
{
if(report_u)
{
ifstream fin("reportupdate.dat",ios::binary);
if(!fin)
cout<<"error";
else
{
clrscr();
cout<<"\tupdate report\n";
while(!fin.eof())
{
fin.read((char*)&e,sizeof(element));
if(fin.eof())
break;
e.output();
getch();
}
fin.close();
cout<<"end of update report";
getch();
}
}
else {
clrscr();
cout<<"no update report found";
getch();
}
}
}
}
void main()
{
ofstream z("reportsearch.dat",ios::binary|ios::trunc);
if(!z)
cout<<"error";
z.close();
ofstream y("reportupdate.dat",ios::binary|ios::trunc);
if(!y)
cout<<"error";
y.close();
clrscr();
highvideo();
char ch;
gotoxy(25,12);
highvideo();
cout<<"welcome to the periodic table\n";
getch();
login();
do
{
clrscr();
cout<<"\t"<<"\t"<<"the periodic table\n\n";
cout<<"1. periodic table details\n";
cout<<"2. search for element \n";
cout<<"3. report\n";
cout<<"4.switch user\n";
cout<<"5. quit\n";
cout<<" enter you choice";
cin>>ch;
switch(ch)
{
case '1': period_det(); break;
case '2': search(); break;
case '3': report(); break;
case '4': login(); break;
case '5': clrscr();
char opt;
cout<<"are you sure?? (y/n) \n";
cin>>opt;
if(opt=='y')
{
clrscr();
gotoxy(33,13);
cout<<"thank you";
getch();
exit(0);
}
break;
default:cout<<"enter a valid option";
getch();
}
}while(1);
}
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