Why am I getting a 'called object 0 is not a function error'?

Question

I\'m a C# developer trying to learn C (followed by C++). I am going native, working on Ubuntu using vim as my text editor, and the Gnu C Compiler (gcc) to compile.

I\'m

Answer 1

In C (and I am assuming that in other languages too :)) an arithmetic operator is needed to perform an arithmetic operation.
Change

int celcius = (5/9)(i-32);

to

int celcius = (5/9)*(i-32);