今天在百忙之中抽出了两个半小时完善了周一的随堂小测，终于完成了王老师的任务。
package org.example;
import javafx.util.Pair;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.*;
public class Main {
static Set<String>set=new HashSet<>();//错题本去重
static Map<String ,Integer>ss=new HashMap<>();//错题的次数
static Map<String,Integer>mp=new HashMap<>();//存对应题目的答案
static List<String>st=new ArrayList<>();//存题目
static int numyes=0,numno=0;//正确个数，错题个数
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
boolean flag1=true,flag2=true;//乘除，括号
int k1,ma,mi;//题目个数，最大最小
while(true){
show1();int n=sc.nextInt();
if(n==5)break;
if(n==4)index();
if(n==1){
System.out.printf("题目是否有乘除法运算(y/n):");
String c=sc.next();
if(c.equals("y"))flag1=true;
else flag1=false;
System.out.printf("出题的个数:");
k1=sc.nextInt();
System.out.printf("操作数最大值:");
ma=sc.nextInt();
System.out.printf("操作数最小值:");
mi=sc.nextInt();
ma=100;
second(flag1,k1,ma,mi);
}else if(n==2){
System.out.printf("题目是否有乘除法运算(y/n):");
String c=sc.next();
if(c.equals("y"))flag1=true;
else flag1=false;
System.out.printf("出题的个数:");
k1=sc.nextInt();
System.out.printf("操作数最大值:");
ma=sc.nextInt();
System.out.printf("操作数最小值:");
mi=sc.nextInt();
ma=1000;
third(flag1,k1,ma,mi);
}else if(n==3){
System.out.printf("题目是否有乘除法运算(y/n):");
String c=sc.next();
if(c.equals("y"))flag1=true;
else flag1=false;
System.out.printf("题目是否有括号(y/n):");
c=sc.next();
if(c.equals("y"))flag2=true;
else flag2=false;
System.out.printf("出题的个数:");
k1=sc.nextInt();
System.out.printf("操作数最大值:");
ma=sc.nextInt();
System.out.printf("操作数最小值:");
mi=sc.nextInt();
forth(flag1,flag2,k1,ma,mi);
}
}
}
public static void show1(){
System.out.println("------------------------------------------------------------");
System.out.println("1、小学二年级题目");
System.out.println("2、小学三年级题目");
System.out.println("3、小学四年级题目");
System.out.println("4、查看今日错题以及汇总");
System.out.println("5、退出系统");
System.out.println("------------------------------------------------------------");
}
public static void show2(){
System.out.println("------------------------------------------------------------");
System.out.println("1、进入下一场答题");
System.out.println("2、查看今日错题");
System.out.println("3、错题二次答题");
System.out.println("------------------------------------------------------------");
}
public static int getrandom(int mi,int ma){
Random r=new Random();
int x=mi+r.nextInt(ma-mi+1);
return x;
}
public static char getchar(String s){
Random r=new Random();
int idx=r.nextInt(4);
return s.charAt(idx);
}
public static void second(boolean f1,int k1,int ma,int mi){
System.out.println("设置倒计时时间:");
Scanner sc=new Scanner(System.in);
int t=sc.nextInt();
String s;
if(f1)s="+-*/";
else s="+-+-";
int cnt=1;
int cntno=0;
List<Pair<String,Integer>>li=new ArrayList<>();
for(;cnt<=k1;){
int[] a=new int[2];
char c=getchar(s);
for(int j=0;j<2;j++)
a[j]=getrandom(mi,ma);
int ans;
if(c=='+')ans=a[0]+a[1];
else if(c=='-')ans=a[0]-a[1];
else if(c=='*')ans=a[0]*a[1];
else{
if(a[1]==0||(a[0]!=0&&a[0]%a[1]!=0))continue;
else ans=a[0]/a[1];
}
String sk=""+a[0]+c+a[1];
mp.put(sk,ans);
Pair<String,Integer>p=new Pair<>(sk,ans);
li.add(p);
cnt++;
}
int id=1;
long time=System.currentTimeMillis()/1000;
for(Pair<String,Integer> p:li){
long cur=System.currentTimeMillis()/1000;
if(cur-time>t)break;
else System.out.printf("还有%ds\n",t-(cur-time));
System.out.println(""+id+":"+p.getKey()+"=");id++;
String sk=p.getKey();
int g=sc.nextInt(),ans=p.getValue();
if(g==ans) {System.out.println("答案正确！");numyes++;cntno++;}
else {System.out.printf("答案错误 ------ 正确答案为:%d\n",ans);
System.out.println();
numno++;
set.add(sk);
if(ss.containsKey(sk))ss.put(sk,ss.get(sk)+1);
else ss.put(sk,1);
}
}
System.out.printf("错题数为:%d，正确率为:%d\n",k1-cntno,cntno*100/k1);
try(PrintWriter wirter=new PrintWriter ("problems1.txt")){
String an="";
int cntc=0;
for(Pair<String,Integer> p:li){
cntc++;
an+=p.getKey();
an+="=";
an+=p.getValue();
an+=" ";
wirter.print(an);
if(cntc%3==0)wirter.println();
an="";
}
}
catch (FileNotFoundException e){
e.printStackTrace();
}
show2();
int n=sc.nextInt();
if(n==1){
return;
}else if(n==2){
index();
}else{
secondtest();
}
}
public static void third(boolean f1,int k1,int ma,int mi){
String s;
if(f1)s="+-*/";
else s="+-+-";
Map<Character,Integer>ap=new HashMap<>();
ap.put('+',1);ap.put('-',1);ap.put('/',2);ap.put('*',2);
System.out.println("设置倒计时时间:");
Scanner sc=new Scanner(System.in);
int t=sc.nextInt();
int cnt=1,cntyes=0;
List<Pair<String,Integer>>li=new ArrayList<>();
for(;cnt<=k1;){
int[] a=new int[4];
boolean fl=true;
for(int i=0;i<4;i++) {
a[i] = getrandom(mi, ma);
if(a[i]<=0)fl=false;
}
if(!fl)continue;
char[] c= new char[3];
for(int i=0;i<3;i++)
c[i]=getchar(s);
Stack<Integer>stk=new Stack<>();
Stack<Character>stck=new Stack<>();
int ans;
String si="";
for(int i=0;i<3;i++){
si+=a[i];
si+=c[i];
}si+=a[3];
int num=0;
boolean f=true;
for(int i=0;i<si.length();i++){
if(si.charAt(i)<='9'&&si.charAt(i)>='0'){
num=num*10+si.charAt(i)-'0';
}else{
stk.add(num);
num=0;
if(stck.empty()||ap.get(si.charAt(i))>ap.get(stck.peek()))stck.add(si.charAt(i));
else{
int num2=stk.peek();stk.pop();
int num1=stk.peek();stk.pop();
char ch=stck.peek();stck.pop();
int sum=0;
if(ch=='-')sum=num1-num2;
else if(ch=='+'){
sum=num1+num2;
if(sum>1000){
f=false;break;
}
}else if(ch=='*'){
sum=num1*num2;
if(sum>1000){
f=false;break;
}
}else{
if(num1%num2!=0){
f=false;break;
}
sum=num1/num2;
}
stk.add(sum);
while(!stck.empty()&&ap.get(si.charAt(i))<=ap.get(stck.peek())){
num2=stk.peek();stk.pop();
num1=stk.peek();stk.pop();
ch=stck.peek();stck.pop();
sum=0;
if(ch=='-')sum=num1-num2;
else if(ch=='+'){
sum=num1+num2;
}else if(ch=='*'){
sum=num1*num2;
}else{
if(num1%num2!=0){
f=false;
}
sum=num1/num2;
}
stk.add(sum);
}
stck.add(si.charAt(i));
}
}
}
if(!f)continue;
stk.add(num);
while(!stck.empty()){
int num2=stk.peek();stk.pop();
int num1=stk.peek();stk.pop();
char ch=stck.peek();stck.pop();
int sum=0;
if(ch=='-'){
sum=num1-num2;
}
else if(ch=='+'){
sum=num1+num2;
if(sum>1000){
f=false;break;
}
}else if(ch=='*'){
sum=num1*num2;
if(sum>10000){
f=false;break;
}
}else{
if(num1%num2!=0){
f=false;break;
}
sum=num1/num2;
}
stk.add(sum);
}
if(!f)continue;
ans=stk.peek();
mp.put(si,ans);
Pair<String,Integer>p=new Pair<>(si,ans);
li.add(p);cnt++;
}
int id=1;
long time=System.currentTimeMillis()/1000;
for(Pair<String,Integer> p:li){
long ti=System.currentTimeMillis()/1000;
if(ti-time>t)break;
else System.out.printf("还有%ds\n",t-(ti-time));
System.out.println(""+id+":"+p.getKey()+"=");id++;
String sk=p.getKey();
int g=sc.nextInt(),ans=p.getValue();
if(g==ans) {System.out.println("答案正确！");numyes++;cntyes++;}
else {System.out.printf("答案错误 ------ 正确答案为:%d\n",ans);
System.out.println();
numno++;
set.add(sk);
if(ss.containsKey(sk))ss.put(sk,ss.get(sk)+1);
else ss.put(sk,1);
}
}
System.out.printf("错题数为:%d，正确率为:%d\n",k1-cntyes,cntyes*100/k1);
try(PrintWriter wirter=new PrintWriter ("problems2.txt")){
String an="";
int cntc=0;
for(Pair<String,Integer> p:li){
cntc++;
an+=p.getKey();
an+="=";
an+=p.getValue();
an+=" ";
wirter.print(an);
if(cntc%3==0)wirter.println();
an="";
}
}
catch (FileNotFoundException e){
e.printStackTrace();
}
show2();
int n=sc.nextInt();
if(n==1){
return;
}else if(n==2){
index();
}else{
secondtest();
}
}
public static void forth(boolean f1,boolean f2,int k1,int ma,int mi){
String s;
if(f1)s="+-*/";
else s="+-+-";
Random r=new Random();
Map<Character,Integer>ap=new HashMap<>();
ap.put('+',1);ap.put('-',1);ap.put('/',2);ap.put('*',2);
ap.put('(',3);
System.out.println("设置倒计时时间:");
Scanner sc=new Scanner(System.in);
int t=sc.nextInt();
int cnt=1,cntyes=0;
List<Pair<String,Integer>>li=new ArrayList<>();
int y=0;
for(;cnt<=k1;){
int l=getrandom(1,4),lr=getrandom(1,4);
if(l>4||l<=0||lr<=0||lr>4||l==lr)continue;
int minl=Math.min(l,lr);
int maxr=Math.max(l,lr);
minl--;maxr--;
int[] a=new int[5];
boolean fl=true;
for(int i=0;i<5;i++) {
a[i] = getrandom(mi,ma);
if(a[i]<=0)fl=false;
}
if(!fl)continue;
char[] c= new char[4];
for(int i=0;i<4;i++)
c[i]=getchar(s);
Stack<Integer>stk=new Stack<>();
Stack<Character>stck=new Stack<>();
int ans;
String si="";
for(int i=0;i<4;i++){
if(i==minl)si+="(";
si+=a[i];
if(i==maxr)si+=")";
si+=c[i];
}si+=a[4];
int num=0;
boolean f=true;
//790+(2731/3714*2435)-4446
for(int i=0;i<si.length();i++){
if(si.charAt(i)<='9'&&si.charAt(i)>='0'){
num=num*10+si.charAt(i)-'0';
}else{
if(num!=0)stk.add(num);
num=0;
if(si.charAt(i)==')'){
while(stck.peek()!='('){
if(stk.size()<2){
f=false;break;
}
int num2=stk.peek();stk.pop();
int num1=stk.peek();stk.pop();
char ch=stck.peek();stck.pop();
int sum=0;
if(ch=='-'){
sum=num1-num2;
}
else if(ch=='+'){
sum=num1+num2;
}else if(ch=='*'){
sum=num1*num2;
}else{
if(num1%num2!=0){
f=false;
}
sum=num1/num2;
}
stk.add(sum);
}
if(!f)break;
stck.pop();
}
else {
if (stck.empty() || ap.get(si.charAt(i)) > ap.get(stck.peek())){
stck.add(si.charAt(i));
if(si.charAt(i)=='(')ap.put('(',0);
}
else {
if(stk.size()<2){
f=false;break;
}
int num2=stk.peek();stk.pop();
int num1=stk.peek();stk.pop();
char ch=stck.peek();stck.pop();
int sum=0;
if(ch=='-')sum=num1-num2;
else if(ch=='+'){
sum=num1+num2;
}else if(ch=='*'){
sum=num1*num2;
}else{
if(num1%num2!=0){
f=false;
}
sum=num1/num2;
}
if(!f)break;
stk.add(sum);
while(!stck.empty()&&ap.get(si.charAt(i))<=ap.get(stck.peek())){
if(stk.size()<2){
f=false;break;
}
num2=stk.peek();stk.pop();
num1=stk.peek();stk.pop();
ch=stck.peek();stck.pop();
sum=0;
if(ch=='-')sum=num1-num2;
else if(ch=='+'){
sum=num1+num2;
}else if(ch=='*'){
sum=num1*num2;
}else{
if(num1%num2!=0){
f=false;
}
sum=num1/num2;
}
stk.add(sum);
}
if(!f)break;
stck.add(si.charAt(i));
}
}
}
}
if(!f)continue;
stk.add(num);
while(!stck.empty()){
if(stk.size()<2){
f=false;break;
}
int num2=stk.peek();stk.pop();
int num1=stk.peek();stk.pop();
char ch=stck.peek();stck.pop();
int sum=0;
if(ch=='-'){
sum=num1-num2;
}
else if(ch=='+'){
sum=num1+num2;
}else if(ch=='*'){
sum=num1*num2;
}else{
if(num1%num2!=0){
f=false;
}
sum=num1/num2;
}
stk.add(sum);
}
if(!f)continue;
ans=stk.peek();
mp.put(si,ans);
Pair<String,Integer>p=new Pair<>(si,ans);
li.add(p);
cnt++;
}
int id=1;
long time=System.currentTimeMillis()/1000;
for(Pair<String,Integer> p:li){
long ti=System.currentTimeMillis()/1000;
if(ti-time>t)break;
else System.out.printf("还有%ds\n",t-(ti-time));
System.out.println(""+id+":"+p.getKey()+"=");id++;
String sk=p.getKey();
int g=sc.nextInt(),ans=p.getValue();
if(g==ans) {System.out.println("答案正确！");numyes++;cntyes++;}
else {System.out.printf("答案错误 ------ 正确答案为:%d\n",ans);
System.out.println();
numno++;
set.add(sk);
if(ss.containsKey(sk))ss.put(sk,ss.get(sk)+1);
else ss.put(sk,1);
}
}
System.out.printf("错题数为:%d，正确率为:%d\n",k1-cntyes,cntyes*100/k1);
try(PrintWriter wirter=new PrintWriter ("problems3.txt")){
String an="";
int cntc=0;
for(Pair<String,Integer> p:li){
cntc++;
an+=p.getKey();
an+="=";
an+=p.getValue();
an+=" ";
wirter.print(an);
if(cntc%3==0)wirter.println();
an="";
}
}
catch (FileNotFoundException e){
e.printStackTrace();
}
show2();
int n=sc.nextInt();
if(n==1){
return;
}else if(n==2){
index();
}else{
secondtest();
}
}
public static void index(){
Scanner sc=new Scanner(System.in);
int k=1;
for(String sy:set){
System.out.printf("%d:%s= 错题次数为%d\n",k++,sy,ss.get(sy));
}
System.out.printf("错题数:%d，正确率:%d\n",numno,numyes/(numno+numyes));
System.out.println("是否进行二次做题(y/n)");
String s=sc.next();
if(s.equals("y"))secondtest();
}
public static void secondtest(){
int k=1;
Scanner sc=new Scanner(System.in);
for(String sy:set){
System.out.printf("%d:%s=",k++,sy);
int ans=sc.nextInt();
if(ans==mp.get(sy)){
System.out.println("回答正确！");
}else{
System.out.printf("答案错误！---- 答案为:%d\n",mp.get(sy));
ss.put(sy,ss.get(sy)+1);
}
}
}
}
标签：int,9.29,System,else,sc,new,out From： https://www.cnblogs.com/binglinll/p/17736976.html