Process-oriented, object-oriented in-depth understanding 1

Process-oriented, object-oriented in-depth understanding 1

First, let's take a look at several exercises.

The first question does not need to be object-oriented.

Exchange the values of two variables. (If ref is used, use the method to pass two int parameters .)

Int num1 = 5; int num2 = 6;

PassProgramExchange num1 = 6, num2 = 5;

 

Figure 1. First calculation question

 

Figure 2. method 2 of Question 1 (no third variable is used)

Here is a shortcut: (CTRL + K + C comments, CTRL + K + u uncomment)

 

Question 2: Implement using methods (Note: What are the parameters and return values of methods ?) :

Calculate the maximum value of two numbers (pass two int type parameters ). Extended: (calculate the maximum number of three, Params)

 

 

Figure 3. If-else Solution

 

 

Figure 4. Three element expression solution for question 2nd and the differences between Ctrl + F5 and F5

 

 

Question 3: Calculate the sum of all the odd numbers between 1 and.

 

Figure 5. Calculate the sum of odd values

 

Question 4: find Fat Man, {200,120, 90,180,110}, and find the fattest person. (the maximum value is an array of int type .) The max () method of the array cannot be called.

 

 

Figure 6. Find the fattest person

 

Question 5: C # converts Chinese characters in the time format in uppercase, for example:"2011Year 6Month 4Day"To"June 4, 2011". (Refer to the tip: Use the string as a char array to determine if it is 2 → '2', 0 → '0', 1 → '1 '...). For the time being, questions such as day 10, day 13, and day 23 are not considered.

 

 

Figure 7. Time Format Conversion in uppercase

Question 6: Create a person class with attributes: name, gender, and age. Method: sayhi (). Create an employee class that inherits the person class, extends the property salary, and overwrites the sayhi method.

The following illustration is not fully written.CodeBut focuses on introducing some important and in-depth knowledge in the class.

 

Figure 8. in-depth understanding of the attributes in the class and the roles of values and return in the attributes during calling

In the above section, we used a concise article to review the object-oriented and process-oriented knowledge. Hope to help you.

 

C #Source codeCompilation process

 

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