2019/6/30 learning summary
This is the first time I use a blog to write a study summary, and I will stick to it every day.
1 JAVA part
Today, I learned a small part of JAVA classes, object-oriented thinking, and inheritance.
1.1 Inheritance of JAVA
Key words:
extends
super()
Difficulties:
super:
The compiler adds " super();" to the first sentence of the subclass by default . When the programmer has written a super statement, regardless of its type (parameters or no parameters), the compiler will no longer automatically add " super();"; and only allow writing at the beginning.
No parameter " super();"will call the parameterless constructor of the parent class ( there is only one );
The super(参数类型1 参数名1，参数类型2 参数名2，...);" parameter" must be added manually, and the corresponding constructor of the parent class ( there is only one ) will be called ;
1.2 JAVA classes
Key words:
new
A class is a specification, and an object is an instance based on it.
Generally speaking, it is more common to use objects, but in certain situations you can also use classes directly.
2 Circuit
2.1 Co-directional amplifier && reverse amplifier
Keywords: Fictitious and fictitious, Kirchhoff
2.2 Adder
Implement adder in the same direction and implement adder in reverse
2.3 Subtractor
Use the same direction and reverse feature to achieve
2.4 Integral && Differential Circuit
Realize with capacitor
3 Data structure and algorithm
Today I learned about stacks and queues of data structures and algorithms, and learned the recursive technology based on the concept of stacks. In addition, realize that the idea of divide and conquer must be used in recursion. Difficulties: hanoi tower problem keywords:hanoi(n,x,y,z)函数