20165219 2017-2018-2 "Java Programming" Pair Programming I Summary of the Second Week
paired object
20165219 Wang Yanbo
20165232 He Yanda
demand analysis
Implement a program that requires:
1 supports integer arithmetic
2 supports multi-operator operations
3 Support fraction operation, support true fraction operation
3 Statistical accuracy
Expansion requirements:
1 Process the generated questions and output to a file
2 After completing the question, read in from the file and judge the question
3 Multi-language support: Simplified Chinese, Traditional Chinese, English
4 Generate topic deduplication
Design ideas
This is a program that needs to support complex operations. It is different from the simple four operations of a single operator. It needs to design multiple classes to implement operations, such as addition, subtraction, multiplication and division, and square operations.
nml diagram (section)
the first week
the second week
code progress
Integer class (first week)
public class IntNumber {
private int A;
public int getA(){
return A;
}
public IntNumber(int A){
this.A = A;
}
public int add(IntNumber op1){
int sum = A + op1.A;
System.out.print(A + " + " + op1.A + "=");
return sum;
}
public int subtract(IntNumber op1){
int num = A - op1.A;
System.out.print(A + " - " + op1.A + "=");
return num;
}
public int multiply(IntNumber op1){
int num = A * op1.A;
System.out.print(A + " * " + op1.A + "=");
return num;
}
public static IntNumber obj(){
Random ran = new Random();
return new IntNumber(ran.nextInt(20)-10);
}
public String divide(Score op1){
System.out.print(op1.getNumerator() + " / " + op1.getDenominator() + "=");
return op1.toString();
}
}Score class:
True or false judgment
Main class NumberCount
Functional screenshot
Tests for Normal Boundary Anomalies
pair feeling
Based on two weeks of pair programming, we feel that designing four arithmetic operations through looping statements is simple in thinking, but also has many shortcomings. At present, it is a shortcoming that it cannot support multi-level operations. At the same time, the code of the fractional calculation also consulted the help of the classmates, and the code of the unit test class was not completed. In general, I have gained something. I believe that in the future study, we can give full play to the help of pair programming ideas for learning.