Pa help po

[m a e 0 9]

Theres something I want to know. I want to know the sum of things so that I can say that I know something.
Instructions

1. Create a function named “sumThing” that takes two integers and returns the sum of the two integers called "thisThing"and “thatThing”.
2. The values of thisThing and thatThing are user inputs separated by a space which means that there should be a scanf() function to take their values.

Input
Two int inputs separated by a space
400·20
Output
One int output
420