calculating two numbers

Question

You know I just wrote a c code. Don't know whether it is wrong or right.
https://code.sololearn.com/co7b65rOYPC0/#c
But when I try to run it, the computer says to give some input in it. Here is the problem. Aint understanding to type what ?? and How to so specifically ??

Answer 1

Line 4:
No type was defined for variable a, b, c.

Line 5:
No semicolon at end of instruction.

Line 7:
No semicolon at end of instruction.

Line 8:
Undefined instruction symbol 'print'.

Also, in SoloLearn you need to provide all input values in the beginning before the code is sent for processing in SoloLearn server. I hope you are aware about thia. Never mind if you run the code on your local computer.

Answer 2

Use comments. If you don't know, check it out on basic concept.