Let us just focus on this..
Example: Blues inputted by the user
Before:
Position Value Address
0 1 0022FEA0
1 2 0022FEA4
2 3 0022FEA8
3 4 0022FEAC
Please input an address:
0022FEA0
Please input the new value for the address inputted:
7
After
Position Value Address
0 7 0022FEA0
1 2 0022FEA4
2 3 0022FEA8
3 4 0022FEAC
Please input an address: