Revert "Revert "Revert "lab03_5var"""

This reverts commit c058b7b0322ca6bafb32e2ca3c9a24c1dd150b97.
laba4
Revert "Revert "Revert "Revert "lab03_5var""""

This reverts commit aadd0051fdb5862322e78a86b744d238c87bc7ec.