第四次

package CSniu;

import java.util.Random;
import java.util.Scanner;

import javax.swing.plaf.basic.BasicInternalFrameTitlePane.RestoreAction;

import org.omg.CORBA.PUBLIC_MEMBER;

public class A1
{
static int zq = 0;
static int cw = 0;

public static void main(String[] args)
{
A1 a = new A1();

System.out.print("请输入答题次数：");
Scanner w = new Scanner(System.in);
int s = w.nextInt();
System.out.println("一共" + s + "道题，" + "答题完毕后自动统计正确率");
for (int i = 0; i < s; i++)
{

System.out.print("请输入需要的运算符：");
Scanner input = new Scanner(System.in);
String x = input.next();
System.out.print("选择混合运算吗？“是或否”");
String y = input.next();
if (y.equals("是"))
{
a.hunHe();
}
int a1 = new Random().nextInt(10) + 1;
int a2 = new Random().nextInt(10) + 1;

switch (x)
{
case "+":
int sum1 = a1 + a2;
System.out.print(a1 + "+" + a2 + "=");
Scanner k1 = new Scanner(System.in);
int q1;
while (true)
{

try
{
q1 = k1.nextInt();
break;
}
catch (Exception e)
{
System.out.println("請輸入一個整數。");
}
}

if (q1 == sum1)
{
System.out.println("答案正确");
zq = zq + 1;
}
else
{
System.out.println("答案错误");
cw = cw + 1;
}
break;
case "-":
int sum2 = a1 - a2;
if (a1 < a2)
{
int sum3 = a2 - a1;
System.out.print("请输入 " + a2 + "-" + a1 + " 的正确答案：");
int q2;
while (true)
{

try
{
Scanner scanner = new Scanner(System.in);
q2 = scanner.nextInt();
break;
}
catch (Exception e)
{
System.out.println("請輸入一個整數。");
}
}
if (q2 == sum3)
{
System.out.println("答案正确");
zq = zq + 1;
}
else
{
System.out.println("答案错误");
cw = cw + 1;
}
break;
}
System.out.print(a1 + "-" + a2 + "=");
Scanner k2 = new Scanner(System.in);
int q2;
while (true)
{

try
{
q2 = k2.nextInt();
break;
}
catch (Exception e)
{
System.out.println("請輸入一個整數。");
}
}
if (q2 == sum2)
{
System.out.println("答案正确");
zq = zq + 1;
}
else
{
System.out.println("答案错误");
cw = cw + 1;
}
break;
case "*":
int sum3 = a1 * a2;
System.out.print(a1 + "*" + a2 + "=");
Scanner k3 = new Scanner(System.in);
int q3;
while (true)
{

try
{
q3 = k3.nextInt();
break;
}
catch (Exception e)
{
System.out.println("請輸入一個整數。");
}
}
if (q3 == sum3)
{
System.out.println("答案正确");
cw = cw + 1;
zq = zq + 1;
}
else
{
System.out.println("答案错误");
cw = cw + 1;
}
break;
case "/":
if (a1 == 0)
{
int sum4 = a2 / a1;
System.out.print(a2 + "/" + a1 + "=");
Scanner k4 = new Scanner(System.in);
int q4;
while (true)
{

try
{
q4 = k4.nextInt();
break;
}
catch (Exception e)
{
System.out.println("請輸入一個整數。");
}
}
if (q4 == sum4)
{
System.out.println("答案正确");
zq = zq + 1;
}
else
{
System.out.println("答案错误");
cw = cw + 1;
}
break;
}
int sum4 = a1 / a2;
System.out.print(a1 + "/" + a2 + "=");
Scanner k4 = new Scanner(System.in);
int q4;
while (true)
{

try
{
q4 = k4.nextInt();
break;
}
catch (Exception e)
{
System.out.println("請輸入一個整數。");
}
}
if (q4 == sum4)
{
System.out.println("答案正确");
zq = zq + 1;
}
else
{
System.out.println("答案错误");
cw = cw + 1;
}
break;

}

}
System.out.println("答题结束,一共" + s + "道题，" + "正确" + zq + "个，错误" + cw + "个。");

}

public void hunHe()
{
Random random = new Random();
Scanner scanner = new Scanner(System.in);
int x = 0;
int y = 0;
int z = 0;
int answer;
int s = random.nextInt(4);
for (int i = 0; i < 4; i++)
{
x = random.nextInt(11);
y = random.nextInt(11);
z = random.nextInt(11);
switch (s)
{
case 0:

System.out.println("请输入" + x + "+" + "(" + y + "*" + z + ")" + "的结果；");
answer = scanner.nextInt();
if (answer != x + (y * z))
{
cw++;
}
else
{
zq++;
}
break;

case 1:
if (y == 0)
{
System.out.println("请输入" + x + "+" + "(" + z + "/" + y + ")" + "的结果；");
answer = scanner.nextInt();
if (answer != x + (z / y))
{
cw++;
}
else
{
zq++;
}
break;
}
System.out.println("请输入" + x + "+" + "(" + y + "/" + z + ")" + "的结果；");
answer = scanner.nextInt();
if (answer != x + (y / z))
{
cw++;
}
else
{
zq++;
}
break;
case 2:
if (x < (y * z))
{
System.out.println("请输入" + "(" + y + "*" + z + ")" + "-" + x + "的结果；");
answer = scanner.nextInt();
if (answer != (y * z) - x)
{
cw++;
}
else
{
zq++;
}
break;
}
System.out.println("请输入" + x + "-" + "(" + y + "*" + z + ")" + "的结果；");
answer = scanner.nextInt();
if (answer != x - (y * z))
{
cw++;
}
else
{
zq++;
}
break;
case 3:
if (y == 0)
{
System.out.println("请输入" + x + "-" + "(" + z + "/" + y + ")" + "的结果；");
answer = scanner.nextInt();
if (answer != x + (z / y))
{
cw++;
}
else
{
zq++;
}
break;
}
System.out.println("请输入" + x + "-" + "(" + y + "/" + z + ")" + "的结果；");
answer = scanner.nextInt();
if (answer != x - (y / z))
{
cw++;
}
else
{
zq++;
}
}
}
}

}

第四次

原文：http://www.cnblogs.com/xingbo12138/p/4909332.html