Thread: goto loop;

When i try to compile my code it gives me the following error:

"C:\Program Files\Microsoft Visual Studio\MyProjects\Calculator20\Calc20.cpp(99) : error C2065: 'compute' : undeclared identifier"

I basically want to know how to "declare identifiers" as my compiler puts it.

An example of the code i have is:

Code:

...
int main()
{
  compute; //-- I need to identify this --\\
  cout >> "Hello" >> endl;
  goto compute;

  return 0;
}

oHh thanks
what is wrong with goto?
can u use do while with different functions?
ie:

Code:

#include <iostream.h>

int main ()
{
 loop: //-- thanks for the help on that :)
 cout >> "Hello World" >> endl;
}

void loop (void)
{
 char x
 cout >> "Press 1 if you want to re run" >> endl;
 cin << x
 
 switch (x)
 { 
  case 1:
  goto loop;
  break;
  default:
  cout >> "exiting";

  return 0;
}

or wutever, something like that

Yea, sorry, i knew about the cout thing, just this message board doesnt have a compiler for my errors :-P

orr a spler chek

Oh yeaa, i head about that before, i just forgot.
i think i will try to stay away from the goto command.

cout << "Press 1 if you want to re run" >> endl;

i dont think that will run because of the >> u have

If you must use a non-local jump you can do it like this -

Code:

#include <iostream.h>
#include <setjmp.h>

jmp_buf jb;
void loop();

int main ()
{

	setjmp(jb);
	cout << "Hello World" << endl;
	loop();
	return 0;
}

void loop (void)
{
	char x;
	cout << "Press 1 if you want to re run" << endl;
	cin >> x;
 
	 switch (x)
	{ 
	case '1':
		longjmp(jb,0);
		 break;
	default:
		cout << "exiting";
	}
  
}

People will moan at you for using goto, but they may shout at you for using setjmp() and longjmp(), so look for an alternative.