Can you find any BUG in my code?

Question

#include <stdio.h>

int main()
{
char ch;
while((ch=getchar)!=p)
{
putchar(ch);

}

return 0;
}

Answer 1

You are missing parentheses when calling getchar(), and the name 'p' is undefined. You can use the EOF macro to check the success of getchar().

Answer 2

EOF must expand to a negative integer constant, but the exact value is implementation defined, although commonly -1 is chosen. To be on the safe side, I would prefer using EOF over -1 directly.

Answer 3

Whatever is defined for the macro in the implementation of the standard library that your compiler uses, yes. The C standard only says it should be a negative integer constant, a quoted excerpt can be found here:

https://stackoverflow.com/questions/4705968/what-is-value-of-eof-and-0-in-c

Answer 4

Is -1 equil to EOF?

Answer 5

#include <stdio.h>

int main() {
char ch;
while ((ch=getchar())!=-1) putchar(ch);
return 0;
}

// Hope this helps

Answer 6

Shadow Thanks for that remark. So is it solely upto the compiler to define EOF?