Box on the output screen

I just wanted a box on the output screen and I wrote the program as follows. I got an error stating "UNDEFINED SYMBOL j"

Any help will be highly appreciated

The program is as follows
#include <iostream.h>
#include <conio.h>
void box(int a,int b,int c,int d)
{
for(int i=a;i<c;i++)
{
gotoxy(i,b); cprintf("\xcd");
gotoxy(i,d); cprintf("\xcd");
}
for(int j=b;j<d;j++)

gotoxy(a,j); cprintf("\xba");
gotoxy(c,j); cprintf("\xba");

gotoxy(a,b); cprintf("\xca");
gotoxy(c,b); cprintf("\xbb");
gotoxy(a,d); cprintf("\xc8");
gotoxy(c,d); cprintf("\xbc");
}
void main()
{
box(5,6,20,20);
getch();
}

abhishekm71 (820)

you don't have braces after the second for loop. only the first statement after the loop is being considered as part of the loop.

Last edited on

djferreira (9)

Thx a lot for ur reply!

Did u mean after the second for loop?

abhishekm71 (820)

yes

djferreira (9)

I did as directed.

This is the new one:

#include <iostream.h>
#include <conio.h>
void box(int a,int b,int c,int d)
{
for(int i=a;i<c;i++)
{
gotoxy(i,b); cprintf("\xcd");
gotoxy(i,d); cprintf("\xcd");
}
for(int j=b;j<d;j++)
{
gotoxy(a,j); cprintf("\xba");
gotoxy(c,j); cprintf("\xba");

gotoxy(a,b); cprintf("\xca");
gotoxy(c,b); cprintf("\xbb");
gotoxy(a,d); cprintf("\xc8");
gotoxy(c,d); cprintf("\xbc");
}
void main()
{
box(5,6,20,20);
getch();
}
}

Still am getting two more errors
(i) Declaration syntax error
(ii) Declaration syntax missing ;

Your help will be greatly appreciated
Also,A big thx for ur continued support!

abhishekm71 (820)

That's because there are still errors in the braces.

#include <iostream.h>
#include <conio.h>
void box(int a,int b,int c,int d)
{
for(int i=a;i<c;i++)
{
gotoxy(i,b); cprintf("\xcd");
gotoxy(i,d); cprintf("\xcd");
}
for(int j=b;j<d;j++)
{
gotoxy(a,j); cprintf("\xba");
gotoxy(c,j); cprintf("\xba");

gotoxy(a,b); cprintf("\xca");
gotoxy(c,b); cprintf("\xbb");
gotoxy(a,d); cprintf("\xc8");
gotoxy(c,d); cprintf("\xbc");
}
} // added this closing brace to end the function.
void main()
{
box(5,6,20,20);
getch();
}
// removed the last unnecassary closing brace.

EDIT: It will help if you indent your code.

#include <iostream.h>
#include <conio.h>

void box(int a,int b,int c,int d)
{
  for(int i=a;i<c;i++)
  {
    gotoxy(i,b); cprintf("\xcd");
    gotoxy(i,d); cprintf("\xcd");
  }
  for(int j=b;j<d;j++)
  {
    gotoxy(a,j); cprintf("\xba");
    gotoxy(c,j); cprintf("\xba");

    gotoxy(a,b); cprintf("\xca");
    gotoxy(c,b); cprintf("\xbb");
    gotoxy(a,d); cprintf("\xc8");
    gotoxy(c,d); cprintf("\xbc");
  }
} // added this closing brace to end the function.

void main()
{
  box(5,6,20,20);
  getch();
}
// removed the last unnecassary closing brace.

Last edited on

djferreira (9)

Its working well!

A million thx!

May God bless you in abundance.

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Box on the output screen