C Programming:ARRAYS Finding greatest number(for n numbers)

This video Shows how to Compare numbers and display highest number.
this is done using arrays.
PLEASE LET ME KNOW IF I CAN SOLVE ANY OF YOUR CODING PROBLEMS(in c) BY leaving comment.

The basic idea is to compare each and every input given by user and compare them it takes some logic.
The knowledge in is highly useful for this kind of problems, so if you don't now what then you need to have a basic idea (its a multi variable declaration in single variable)
thank you..