以下为代码,可以运行,但和预期结果有点差距,可我又不知道怎么改,请大家帮我看一下,谢谢!!import javax.swing.*;
import java.util.*;
public class Exercise1 {
public int A()
{
Random x = new Random();
double y = x.nextDouble() * 100;
int z = (int) y;
return z;
}
public boolean Number()
{
Exercise1 ex1 = new Exercise1();
int a = ex1.A();
int b = ex1.A();
int c = ex1.A();
String aa = Integer.toString(a);
String bb = Integer.toString(b);
String str = "";
int answer = 0;
switch(c%5)
{
case 0:
answer = a+b;
str = JOptionPane.showInputDialog(aa + "+" + bb);
break;
case 1:
answer = a-b;
str = JOptionPane.showInputDialog(aa + "-" + bb);
break;
case 2:
answer = a*b;
str = JOptionPane.showInputDialog(aa + "*" + bb);
break;
case 3:
answer = a/b;
str = JOptionPane.showInputDialog(aa + "/" + bb);
break;
case 4:
answer = a%b;
str = JOptionPane.showInputDialog(aa + "%" + bb);
break;
}
int n = Integer.parseInt(str);
if(n == answer)
{
return true;
}
else
{
return false;
}
}
public static void main(String [] args)
{
Exercise1 ex = new Exercise1();
ex.Number();
boolean Ch = ex.Number();
if(Ch)
{
JOptionPane.showMessageDialog(null, "正确", "结果",
JOptionPane.PLAIN_MESSAGE);
}
else
{
JOptionPane.showMessageDialog(null, "错误", "结果",
JOptionPane.PLAIN_MESSAGE);
}
}
}
import java.util.*;
public class Exercise1 {
public int A()
{
Random x = new Random();
double y = x.nextDouble() * 100;
int z = (int) y;
return z;
}
public boolean Number()
{
Exercise1 ex1 = new Exercise1();
int a = ex1.A();
int b = ex1.A();
int c = ex1.A();
String aa = Integer.toString(a);
String bb = Integer.toString(b);
String str = "";
int answer = 0;
switch(c%5)
{
case 0:
answer = a+b;
str = JOptionPane.showInputDialog(aa + "+" + bb);
break;
case 1:
answer = a-b;
str = JOptionPane.showInputDialog(aa + "-" + bb);
break;
case 2:
answer = a*b;
str = JOptionPane.showInputDialog(aa + "*" + bb);
break;
case 3:
answer = a/b;
str = JOptionPane.showInputDialog(aa + "/" + bb);
break;
case 4:
answer = a%b;
str = JOptionPane.showInputDialog(aa + "%" + bb);
break;
}
int n = Integer.parseInt(str);
if(n == answer)
{
return true;
}
else
{
return false;
}
}
public static void main(String [] args)
{
Exercise1 ex = new Exercise1();
ex.Number();
boolean Ch = ex.Number();
if(Ch)
{
JOptionPane.showMessageDialog(null, "正确", "结果",
JOptionPane.PLAIN_MESSAGE);
}
else
{
JOptionPane.showMessageDialog(null, "错误", "结果",
JOptionPane.PLAIN_MESSAGE);
}
}
}
import javax.swing.*;
import java.util.*;public class Exercise1 {
public int A() {
Random x = new Random();
double y = x.nextDouble() * 100;
int z = (int) y;
return z;
} public boolean Number() {
Exercise1 ex1 = new Exercise1();
int a = ex1.A();
int b = ex1.A();
int c = ex1.A();
String aa = Integer.toString(a);
String bb = Integer.toString(b);
String str = "";
int answer = 0;
switch (c % 5) {
case 0:
answer = a + b;
str = JOptionPane.showInputDialog(aa + "+" + bb);
break;
case 1:
answer = a - b;
str = JOptionPane.showInputDialog(aa + "-" + bb);
break;
case 2:
answer = a * b;
str = JOptionPane.showInputDialog(aa + "*" + bb);
break;
case 3:
answer = a / b;
str = JOptionPane.showInputDialog(aa + "/" + bb);
break;
case 4:
answer = a % b;
str = JOptionPane.showInputDialog(aa + "%" + bb);
break;
}
int n = Integer.parseInt(str);
if (n == answer) {
return true;
} else {
return false;
} } public static void main(String[] args) {
Exercise1 ex = new Exercise1();
//ex.Number();
boolean Ch = ex.Number();
if (Ch) {
JOptionPane.showMessageDialog(null, "正确", "结果",
JOptionPane.PLAIN_MESSAGE);
} else {
JOptionPane.showMessageDialog(null, "错误", "结果",
JOptionPane.PLAIN_MESSAGE);
}
}
}在main里面ex.Number()运行了两次 删掉第一个就可以了