int vs *char

[Pter0dactyl]

friends i compiled this code and i dont understand how the output is 42.the condition in if should be an int but we put a string and still we got 42.i expected an error like "cannot convert *char to int"

 ‪#‎include‬<stdio.h>
 int main()
 {
 int x;
 x=42;
 if("yes")
 {
 int x;
 x++;
 }
 printf("%d\n",x);
 return 0;
 }

[wildblue]

You're declaring a new variable x in the if block. That x variable is not the same as the one declared outside the if block. I just added a couple of extra output statements to the code to show the difference.

the value of x in the if statement is 1
the value of x outside the if statement is 42

[Pter0dactyl]

yea that i figured out already.my problem isnt with scope related concept.what i'm asking is why *char when converted to int don show any error.

[2AoiNwbp]

Why do you think that char* must be converted to int in that expression? "yes" is just a single expression different than 0, which makes it true.
Thus, if you put a print statement inside the if block, you'll see the real value of the inner x (which is never initialized, so it could have any value)

[2AoiNwbp]

After doing so, you can test

if(!"yes")

and see, it turns to false.

regards,
Alejandro

[Pter0dactyl]

Ok Thanks for the answer.