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import java.util.*;
public class Test {
public static void main(String[] args) {
System.out.println("输入测试题数目:");
Scanner sc=new Scanner(System.in);
int number=sc.nextInt();
double right = 0;
double wrong = 0;
for (int i = 0; i < number; i++) {
System.out.println("第"+(i+1)+"道题,请在下方输入答案:");
double op1=(int)(Math.random()*10);
double op2=(int)(Math.random()*10);
Random r3 = new Random();
int m = r3.nextInt(4);
char[] chs = {'+','-','*','/'};
String Operator = String.valueOf(chs[m]);
//生成题目
if(Operator.equals("+")){
System.out.println(op1+"+"+op2+"=");
boolean b = add(op1,op2);
if(b == true){
right++;System.out.println("right! ");
}
else{
wrong++;System.out.println("no ");
System.out.println("right answer: "+(op1+op2));
}
}
else if(Operator.equals("-")){
System.out.println(op1+"-"+op2+"=");
boolean b =minus(op1,op2);
if(b == true){
right++;System.out.println("right! ");
}
else{
wrong++;System.out.println("no ");
System.out.println("right answer: "+(op1-op2));
}
}
else if(Operator.equals("*")){
System.out.println(op1+"×"+op2+"=");
boolean b =times(op1,op2);
if(b == true){
right++;System.out.println("right! ");
}
else{
wrong++;System.out.println("no ");
System.out.println("right answer: "+(op1*op2));
}
}
else{
System.out.println(op1+"÷"+op2+"=");
boolean b =Div(op1,op2);
if(b == true){
right++;System.out.println("right! ");
}else{
wrong++;System.out.println("no ");
System.out.println("right answer: "+op1/op2);
}
}
}
System.out.println("做对了"+right+"道题.");
System.out.println("做错了"+wrong+"道题.");
System.out.println("正确率为"+(right/(wrong+right))*100+"%");
}
private static boolean add(double x,double y) {
Scanner sc = new Scanner(System.in);
double num1 = sc.nextDouble();
double result = x + y;
if(num1 == result){
return true;
}else{
return false;
}
}
private static boolean minus(double x,double y) {
Scanner sc = new Scanner(System.in);
double num1 = sc.nextDouble();
double result = x - y;
if(num1 == result){
return true;
}else{
return false;
}
}
private static boolean times (double x,double y) {
Scanner sc = new Scanner(System.in);
double num1 = sc.nextDouble();
double result = x * y;
if(num1 == result){
return true;
}else{
return false;
}
}
private static boolean Div(double x,double y) {
Scanner sc = new Scanner(System.in);
double num1 = sc.nextDouble();
double result =x/y;
if(num1 == result){
return true;
}else{
return false;
}
}
}
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