2015/3/6 Introduction to Software engineering classroom operations

Experimental requirements: Write a piece of code, execute the result output 30 arithmetic topic, consider the level of second grade students in primary school

Experiment idea: Use random method to generate the stochastic number, define each number range; Select an operator randomly with switch and edit the output order of the number and symbol

The code is as follows:

Import java.util.*;

public class Test {

public static void Main (string[] args) {

TODO auto-generated Method Stub

for (int i = 0; i <; i++) {

Random r = new Random ();

int a = r.nextint (100);

int b = r.nextint (100);

int c = R.nextint (4);

char d = ';

Switch (c) {

Case 0:

d = ' + ';

Break

Case 1:

d = '-';

Break

Case 2:

d = ' x ';

Break

Case 3:

d = ' ÷ ';

if (b==0) {

i--;

Continue

}

Break

Default

d = ';

}

SYSTEM.OUT.PRINTLN (i + 1 + "." + A + D + b);

}

}

}

2015/3/6 Introduction to Software engineering classroom operations