To ensure completeness of classification discussions when designing algorithms

1 What is completeness

If the algorithm has more than one branch, make sure that each branch is gone. This time if you do not tidy up their own confused, programming is prone to errors. To tidy up clearly.

2 What's going to happen to the completeness of the problem

When the trend of the algorithm is affected by the value of 2, 3 and more variables, it will appear to be divided into several branches to consider, resulting in complete problems.

For example, 3 variables can be true and false, then there are 8 possible scenarios. In addition, the most deadly is to ensure logical rationality, in determining the order of the variables to determine, you also need to explore, maybe A's decision placed in the back of B will make the whole logic clearer.

3 How to ensure completeness

First, determine the number of possible, such as a, B, c three variables, a and C there are 2 possible, b there are 3 possible. So there's a total of 2*2*3=12 possible.

Second, the proper arrangement of the order of decisions A, B, C, to ensure that each of the branching species may have come, and is logical.

To ensure completeness of classification discussions when designing algorithms