WHY THIS CPP PROGRAM SHOWS AN ERROR

[gouriproutray]

#include<iostream.h>
int main()
{
if(1)
int x;
x++;
cout<<x;
}
/*WHY THE DECLARATION CANNOT BE APPLIED HERE. IN C++ U CAN DECLAR ANY VARIABLE ANY WHERE BEFORE U USE THIS,THEN WHY THIS SHOWS AN ERROR*/

[sk_kireeti]

gouriproutray,

What you said is true. In C++ we can declare a variable at any of time within program, before using it. But the limiting factor is, scope of the variable.

In you case, "x" has block scope i.e., X is accessible with in the "if" block. In your case, x++ is out of "if" block. So it is not accessible.

Thanks,
Krishna

[gouriproutray]

...
if(1)
int x;
x++;
...
in this the error occured in 2nd line as the declaration cannot be done here.. why???

[tarzan7373]

ur code is

if(1)
int x; // this is end of ur if block, and all declarations in if block are not alive beyond if block
x++; // dat is why u will get an err at this step cos 'x' is not declared