Question

well the o/p of the following fragment:
if(a=0)
printf("a is zero");
else
printf("a is non zero");

Answer 1

i don't understand what do you want?

Answer 2

you mean the problem? You're assigning 0 to a.

Answer 3

Assuming a is declared, the conditional will always evaluate to 0 (or false), since the value of the expression within the if statement will always evaluate to 0, and therefore the statement "printf("a is non zero")" will be executes.

Answer 4

to catch these sorts of errors, you could try placing the numeric literal on the left-hand side of the expression:

if (0 = a) // will give you an error something like lhs must be l-value

anyways, compilers like gcc (with some warning settings turned on) will warn you whenever you have assignments within conditionals anyway.

Answer 5

oh, and I just figured out that when you mentioned 'o/p' in your question, you meant output :-P

Answer 6

One of the biggest butt biters in C and C derived languages is that "=" is an assignment operator, "==" is a comparison operator. I hate when I type it wrong!

Answer 7

yes o/p means output.sry for that.
then the output of the above program is "a is non zero".
I assume that output of the above one is "a is zero" since a has been successfully assigned and hence returns 1.so the output must be "a is zero" .I couldn't trace the reason.

Answer 8

have you tried placing == instead of =? and what language is it?