whats that?

[cracksevi]

while i was reading a tutorial from a site i reached the goto thingy...but the example thats given there didnt explain really enuf to me....can someone tell me what is that "goto" for?


// goto loop example
#include <iostream.h>
int main ()
{
int n=10;
loop:
cout << n << ", ";
n--;
if (n>0) goto loop;
cout << "FIRE!";
return 0;
}

and the output is : 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, FIRE!


thats the example in the site...but it seems to have no difference than while command..even while command could be more useful there..another explanation can be so nice.....
thanx bros !

[Valmont]

Do you see the "loop:" tag in the code?
The "goto" keyword goes to that tag. Goto's are evil.

[redhead]

Originally posted by Valmont
Goto's are evil.

They're only evil if you dont know what you're doing.
cracksevi, the code could have been written as:

#include <iostream.h>
int main ()
{
  int n=10;
  while(n > 0)
  {  
    cout << n << ", ";
    n--; 
  }
  cout << "FIRE!";
  return 0;
}

The execution will jump to the loop lable in the begining of the code, as long as the if (n>0) condition is true.

[Kernel_Killer]

Why they added GOTO's to C/C++ is beyond me. They were great back in the BASIC days, but really when dealing with C/C++ while/for/switch,etc are much better.

[joe_bruin]

gotos are incredibly useful in some circumstances, but they are rare and must be used wisely. you don't need goto to write bad code, and c is not in the business of stopping you from doing stupid things, so there's no reason to take away a valuable tool. that's what java is for.

remember the c programmer's motto: "don't fuk up".

[Valmont]

Perhaps they can be usefull in C. In C++ they are never needed I think unless one insists on an ( occasional) procedural programming.

[joe_bruin]

exceptions in c++ replace the use of gotos in many instances.