C++ Assignment

Write a C++ program to implement Dictionary using Design by Contract. Dictionary holds keys, and for each key it also holds a value. In the dictionary we are going to implement, the key is people's names and people's email address is the associated values. Client uses dictionary class should not be able to add two entries with the same key. Also, the client which uses Dictionary class, should not be able to remove an entry which does not exist. Use DbC to describe the dictionary class contract and use unit test program to test it. You should deliver a zip file containing: 1) File containing the dictionary class designed by DbC concepts. 2) Cpp main file containing two test functions one that passes the test and another one that fails.