My code written

I put my code to the cacheMatrix.R file
Revert "My code written"

This reverts commit 310c14a293a2013d9e5b3572ac2c6d497d905b59.
Revert "Revert "My code written""

This reverts commit 2104806deba8f5a0ebea8b1e9440fb7e2786728b.