Also, the IF-else statement

Recently, I encountered some condition judgment statements in my work. The scenario is as follows:

1. The aggregation statistics method entered by the user can only be used in two cases: max (...) and min (...)

2. The input interpretation module truncates the first four characters and then compares and matches them as strsummaryway.

 

I can see that this process is as follows:

If (summaryway = 'max (')

Processing Based on the maximum value;

Else

Processing Based on the minimum value;

 

Obviously, this is an incomplete expression of judgment. if the input is not considered, it may be a case other than Max and Min, but it is assumed that Max is Min. the modified processing method should be:

If (strsummaryway = 'max (')

Processing Based on the maximum value;

Else if (strsummaryway = 'min (')

Processing Based on the minimum value;

Else

Returns an error or throws an exception (as required by the Program );

 

From this simple method, I am also alert myself,

1. Complete judgment and processing should be considered.

2. Determine the IF-else condition and use the last else to handle exceptions.

3. If there is a 1% Probability Error in a function, it will be executed 10 times, and 20 times it is similar to a 1% probability error function, the probability of an error is quite high!