0911 week test question drawing baby
Machine test instructions
Exam time, three classes
After encoding, send a message in the QQ group to call verification
Field verification results
01 Define a class and provide readme information
Class definition requirements:
Class name, DrawBaby
Has the attribute, name
Has the method, show_info
02 instantiate this class as an object
Claim:
Instantiate the DrawBaby class as an object, the object name is obj
The object's name value is the candidate's name, such as Lu Xiaobu
Improve the readme method show_info, when calling this method is to print
我是画画的baby吕小布
Completion criteria
Call show_info method
Can be displayed normally
我是画画的baby某某某
03 Method of drawing a straight line
Claim
Writing method writeLine
Call this method to print the following graphics
！！！！！
Completion criteria
Call the method and see an exclamation mark
04 How to print multiple lines
Claim
Writing method writeMultiLine
Receive an int parameter
Incoming number
Just print a few lines
！！！！！
E.g
Pass parameter is 3, the result will be
！！！！！
！！！！！
！！！！！
Completion criteria
Call method
Incoming parameters
See multiple exclamation marks
05 Calculate the result of multiplication of two numbers
Claim
Writing method multiplication
Receive two integers
Return the result of two numeric operations
Completion criteria
Execute the following code
System.out.println(obj.multiplication(2,3))
Can get result 6
Change the parameters to have the correct result printout
06 Draw a right triangle
Writing method writeTriangle
Receive a parameter
If you pass the value 3, it will draw three rows of triangles, and the output symbol is *
E.g:
*
**
***
If you pass the value 5, it will draw a triangle of five rows
Completion criteria
obj.writeTriangle(7)
Can draw 7 rows of triangles
07 Return a right triangle
Claim
Write the writeTriangleRet method
Its internal operation is the same as Question 06
Receive a parameter
The difference is that this method does not print output
It will return the triangle string
Completion criteria
System.out.println(obj.writeTriangleRet(3))
You can see three rows of triangles