Please use code tags for code, they show the spacing properly.
Code:
void func()
{
int x = 50;
{
int y;
y = x + 400;
printf("x = %d\n",x);
printf("y = %d\n",y);
}
}
Quote:
Originally Posted by mxms755
hi friends,
the following code works fine,but the question is
"is this a valid c".
i really have no idea.......
Assuming you've included stdio.h earlier in the file, then yes, this is perfectly legal code. It's not even trick code in any way, I can't see anything wrong with it.
What might be confusing you is the strange by-themselves {'s, yes? Those are defining a code block, the same kind you use whenever you do if(something) { do_something(); }, but not attached to any statement. Naked ones like these are used to limit the scope of variables. The variables defined inside it, are only valid inside the code block. If you know the difference between global and local variables, then a codeblock is just one level deeper:
Code:
/* global variable */
int a;
void func()
{
/* local variable */
int b;
/* variables a,b are visible here */
{
int c;
/* variables a,b,c visible here */
{
int d;
/* variables a,b,c,d visible here */
}
{
int e;
/* variables a,b,c,e visible here */
}
}
{
int f;
/* variables a,b,f visible here */
{
int g;
/* variables a,b,f,g visible here */
}
{
int g;
/* variables a,b,f,g visible here.
* Note that the value of the PREVIOUS g is not preserved! Treat this
* like a totally seperate variable. */
}
}
}
Last edited by Corona688; 05-17-2006 at 12:10 PM..
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