Addition in C language

Question

Check out my code
https://code.sololearn.com/cKxgE8898AfP/?ref=app

Answer 1

Gamer Boy have a nice learning!

Answer 2

The main method returns an integer. Change the return type of the function to int.
int main(){...}

Answer 3

Qtwizard is right!

I suggest you to use "code blocks" to write your programs