10.20
代码部分：
package lianxi;
import java.util.Scanner;
import java.lang.Thread;
public class reduam4 {
public static void main(String[] args) {//主函数
int a=0;
Scanner in=new Scanner(System.in);
ZhuJieMian();
System.out.println("请输入你想进行的操作");
a=in.nextInt();
do {//控制循环
switch(a) {
case 1:SheCan();break;
case 2:XiaoEr();break;
case 3:XiaoSan();break;
case 4:XiaoSi();break;
case 5:CuoTiJi();break;
case 6:CuoTiChongZuo();
break;
}
System.out.println("请输入你想进行的操作");
a=in.nextInt();
}while(a!=0);
}
public static void SheCan() {//设置参数
Scanner in=new Scanner(System.in);
System.out.println("出题个数为");
chutigeshu=in.nextInt();
System.out.println("最大值为");
zuidazhi=in.nextInt();
System.out.println("最小值为");
zuixiaozhi=in.nextInt();
}
public static void ZhuJieMian() {//设置主界面
System.out.println("1.参数设置");
System.out.println("2.小学二年级口算题");
System.out.println("3.小学三年及口算题");
System.out.println("4.小学四年级口算题");
System.out.println("5.错题集");
System.out.println("0.退出循环");
}
public static void XiaoEr() {//二年级方法
Scanner in=new Scanner(System.in);
Integer[] q1=new Integer[chutigeshu];
Integer[] w1=new Integer[chutigeshu];
Character[] e1=new Character[chutigeshu];
int i=0,j;
int a1,a;
int b;
int c,daan;
int h1=0,h2=0;
char x='+';
for(i=0;i<chutigeshu;i++) {
a1=(int)(Math.random()*(zuidazhi-zuixiaozhi)+(zuixiaozhi));
b=(int)(Math.random()*(zuidazhi-zuixiaozhi)+(zuixiaozhi));
c=(int)(Math.random()*4+1);
switch(c) {
case 1:x='+';break;
case 2:x='-';break;
case 3:x='*';break;
case 4:x='/';break;
}
if(c==4) {
if(a1%b!=0) {
do {
b=(int)(Math.random()*(zuidazhi-zuixiaozhi)+(zuixiaozhi));
}while(a1%b!=0);
}
}
q1[i]=a1;
w1[i]=b;
e1[i]=x;
for(j=0;j<i;j++) {
if(q1[j]==q1[i]&&w1[j]==w1[i]&&e1[j]==e1[i])
break;
}
System.out.println((i+1)+":"+a1+x+b+"=");
if(x=='+') {
a=a1+b;
}
else if(x=='-') {
a=a1-b;
}
else if(x=='*') {
a=a1*b;
}
else {
a=a1/b;
}
daan=in.nextInt();
System.out.println("正确答案:"+a);
if(daan==a) {
System.out.println("答对了");
h1++;
}
else {
System.out.println("答错了,计入错题集");
h2++;
q[s]=a1;
w[s]=b;
e[s]=x;
daer[s]=a;
s++;
}
}
System.out.println("答对了"+h1+"道题，答错了"+h2+"道题");
System.out.println("正确率:"+((double)h1/(double)chutigeshu));
System.out.println("错题有:");
for(i=0;i<s;i++) {
System.out.println(q[i]+""+e[i]+""+w[i]+"=");
}
}
public static void XiaoSan() {//三年级方法
Scanner in=new Scanner(System.in);
System.out.println("请输入操作数个数:(不超过四个)");
int caozuoshugeshu=in.nextInt();
Integer[][] r1=new Integer[chutigeshu][caozuoshugeshu];
Integer[][] t1=new Integer[chutigeshu][caozuoshugeshu];
Character[][] x1=new Character[chutigeshu][caozuoshugeshu];
int i=0,j,h,h1=0,h2=0;
int total=0;
for(i=0;i<chutigeshu;i++) {
for(j=0;j<caozuoshugeshu;j++) {
r1[i][j]=(int)(Math.random()*(zuidazhi-zuixiaozhi)+zuixiaozhi);
}
for(j=0;j<caozuoshugeshu-1;j++) {
t1[i][j]=(int)(Math.random()*4+1);
}
t1[i][caozuoshugeshu-1]=32;
for(j=0;j<caozuoshugeshu;j++) {
switch(t1[i][j]) {
case 1:x1[i][j]='+';break;
case 2:x1[i][j]='-';break;
case 3:x1[i][j]='*';break;
case 4:x1[i][j]='/';break;
case 32:x1[i][j]='=';break;
}
ChaChong(r1,x1,caozuoshugeshu,i);
}
total=r1[i][0];
System.out.print((i+1)+":");
for(j=0;j<caozuoshugeshu;j++) {
System.out.print(r1[i][j]+""+x1[i][j]);
}
for(j=0;j<caozuoshugeshu;j++) {
while((x1[i][j]=='*'||x1[i][j]=='/')&&j<caozuoshugeshu){
if(x1[i][j]=='*') {
total*=r1[i][j+1];
}
else {
total/=r1[i][j+1];
}
j++;
}
if(x1[i][j]=='+'||x1[i][j]=='-') {
int u=r1[i][j+1];
if(x1[i][j]=='+') {
while((x1[i][j+1]=='*'||x1[i][j+1]=='/')&&(j+1)<caozuoshugeshu){
if(x1[i][j+1]=='*') {
u*=r1[i][j+2];
}
else {
u/=r1[i][j+2];
}
j++;
}
total+=u;
}
else if(x1[i][j]=='-') {
while((x1[i][j+1]=='*'||x1[i][j+1]=='/')&&(j+1)<caozuoshugeshu){
if(x1[i][j+1]=='*') {
u*=r1[i][j+2];
}
else {
u/=r1[i][j+2];
}
j++;
}
total-=u;
}
}
}
h=in.nextInt();
System.out.println("正确答案:"+total);
if(h==total) {
System.out.println("答对了");
h1++;
}
else {
System.out.println("答错了");
h2++;
t2[s1]=i;
dasan[s1]=total;
s1++;
}
}
for(i=0;i<s1;i++) {
for(j=0;j<caozuoshugeshu;j++) {
r[i][j]=r1[t2[i]][j];
x[i][j]=x1[t2[i]][j];
}
}
System.out.println("答对了"+h1+"道题，答错了"+h2+"道题");
System.out.println("正确率:"+((double)h1/(double)chutigeshu));
System.out.println("错题有:");
for(i=0;i<s1;i++) {
for(j=0;j<caozuoshugeshu;j++) {
System.out.print(r1[t2[i]][j]+""+x1[t2[i]][j]);
}
System.out.println();
}
}
public static void ChaChong(Integer[][] q,Character[][]w,int caozuoshugeshu,int p) {
int i,j;//进行查重
for(i=0;i<p;i++) {
for(j=0;j<caozuoshugeshu;j++) {
if(q[i][j]==q[p][j]||w[i][j]==w[p][j])
break;
}
}
}
public static void CuoTiJi() {//错题集
Scanner in=new Scanner(System.in);
System.out.println("请输入你想查询哪个阶段的错题(二年级输2,三年级输3,四年级输4):");
int a=in.nextInt();
int i=0,j=0;
switch(a) {
case 2:for(i=0;i<s;i++) {
System.out.println(q[i]+""+e[i]+""+w[i]+"=");
}break;
case 3:for(i=0;i<s1;i++) {
for(j=0;j<caozuoshugeshu;j++) {
System.out.print(r[t2[i]][j]+""+x[t2[i]][j]);
}
System.out.println();
}break;
case 4:for(i=0;i<s2;i++) {
if(x2[t4[i]][0]=='+'||x2[t4[i]][0]=='-') {
System.out.print("("+r2[t4[i]][0]+""+x2[t4[i]][0]+r2[t4[i]][1]+")"+x2[t4[i]][1]);
for(j=2;j<caozuoshugeshu2;j++) {
System.out.print(r2[t4[i]][j]+""+x2[t4[i]][j]);
}
}
else {
for(j=0;j<caozuoshugeshu2;j++) {
System.out.print(r2[t4[i]][j]+""+x2[t4[i]][j]);
}
}
System.out.println();
}break;
}
}
public static void XiaoSi() {//四年级运算题
Scanner in=new Scanner(System.in);
int i=0,j=0,total=0,h=0,h1=0,h2=0;
int kuohao=0;
System.out.println("请输入操作数个数(不超过五个):");
int caozuoshugeshu2=in.nextInt();
Integer[][] r3=new Integer[chutigeshu][caozuoshugeshu2];
Integer[][] t3=new Integer[chutigeshu][caozuoshugeshu2];
Character[][] x3=new Character[chutigeshu][caozuoshugeshu2];
for(i=0;i<chutigeshu;i++) {
for(j=0;j<caozuoshugeshu2;j++) {
r3[i][j]=(int)(Math.random()*(zuidazhi-zuixiaozhi)+zuixiaozhi);
}
for(j=0;j<caozuoshugeshu2-1;j++) {
t3[i][j]=(int)(Math.random()*4+1);
}
t3[i][caozuoshugeshu2-1]=32;
for(j=0;j<caozuoshugeshu2;j++) {
switch(t3[i][j]) {
case 1:x3[i][j]='+';break;
case 2:x3[i][j]='-';break;
case 3:x3[i][j]='*';break;
case 4:x3[i][j]='/';break;
case 32:x3[i][j]='=';break;
}
ChaChong(r3,x3,caozuoshugeshu2,i);
}
total=r3[i][0];
System.out.print((i+1)+":");
if(x3[i][0]=='+'||x3[i][0]=='-') {
System.out.print("("+r3[i][0]+""+x3[i][0]+""+r3[i][1]+")"+x3[i][1]);
for(j=2;j<caozuoshugeshu2;j++) {
System.out.print(r3[i][j]+""+x3[i][j]);
}
if(x3[i][0]=='+') {
total=r3[i][0]+r3[i][1];
}
else {
total=r3[i][0]-r3[i][1];
}
r3[i][1]=total;
for(j=1;j<caozuoshugeshu2;j++) {
while((x3[i][j]=='*'||x3[i][j]=='/')&&j<caozuoshugeshu2){
if(x3[i][j]=='*') {
total*=r3[i][j+1];
}
else {
total/=r3[i][j+1];
}
j++;
}
if(x3[i][j]=='+'||x3[i][j]=='-') {
int u=r3[i][j+1];
if(x3[i][j]=='+') {
while((x3[i][j+1]=='*'||x3[i][j+1]=='/')&&(j+1)<caozuoshugeshu2){
if(x3[i][j+1]=='*') {
u*=r3[i][j+2];
}
else {
u/=r3[i][j+2];
}
j++;
}
total+=u;
}
else if(x3[i][j]=='-') {
while((x3[i][j+1]=='*'||x3[i][j+1]=='/')&&(j+1)<caozuoshugeshu2){
if(x3[i][j+1]=='*') {
u*=r3[i][j+2];
}
else {
u/=r3[i][j+2];
}
j++;
}
total-=u;
}
}
}
}
else{
for(j=0;j<caozuoshugeshu2;j++) {
System.out.print(r3[i][j]+""+x3[i][j]);
}
for(j=0;j<caozuoshugeshu2;j++) {
while((x3[i][j]=='*'||x3[i][j]=='/')&&j<caozuoshugeshu2){
if(x3[i][j]=='*') {
total*=r3[i][j+1];
}
else {
total/=r3[i][j+1];
}
j++;
}
if(x3[i][j]=='+'||x3[i][j]=='-') {
int u=r3[i][j+1];
if(x3[i][j]=='+') {
while((x3[i][j+1]=='*'||x3[i][j+1]=='/')&&(j+1)<caozuoshugeshu2){
if(x3[i][j+1]=='*') {
u*=r3[i][j+2];
}
else {
u/=r3[i][j+2];
}
j++;
}
total+=u;
}
else if(x3[i][j]=='-') {
while((x3[i][j+1]=='*'||x3[i][j+1]=='/')&&(j+1)<caozuoshugeshu2){
if(x3[i][j+1]=='*') {
u*=r3[i][j+2];
}
else {
u/=r3[i][j+2];
}
j++;
}
total-=u;
}
}
}
}
h=in.nextInt();
System.out.println("正确答案:"+total);
if(h==total) {
System.out.println("答对了");
h1++;
}
else {
System.out.println("答错了");
h2++;
t4[s2]=i;
dasi[s2]=total;
s2++;
}
}
for(i=0;i<s2;i++) {
for(j=0;j<caozuoshugeshu2;j++) {
r2[i][j]=r3[t4[i]][j];
x2[i][j]=x3[t4[i]][j];
}
}
System.out.println("答对了"+h1+"道题，答错了"+h2+"道题");
System.out.println("正确率:"+((double)h1/(double)chutigeshu));
System.out.println("错题有:");
for(i=0;i<s2;i++) {
if(x3[t4[i]][0]=='+'||x3[t4[i]][0]=='-') {
if(x3[t4[i]][0]=='+')
System.out.print("("+r3[t4[i]][0]+""+x3[t4[i]][0]+""+(r3[t4[i]][1]-r3[t4[i]][0])+")"+x3[t4[i]][1]);
else
System.out.print("("+r3[t4[i]][0]+""+x3[t4[i]][0]+""+(-r3[t4[i]][1]+r3[t4[i]][0])+")"+x3[t4[i]][1]);
for(j=2;j<caozuoshugeshu2;j++) {
System.out.print(r3[t4[i]][j]+""+x3[t4[i]][j]);
}
}
else {
for(j=0;j<caozuoshugeshu2;j++) {
System.out.print(r3[t4[i]][j]+""+x3[t4[i]][j]);
}
}
System.out.println();
}
}
public static void CuoTiChongZuo() {//错题查重
Scanner in=new Scanner(System.in);
System.out.println("请输入你想重做哪个阶段的错题(二年级输2,三年级输3,四年级输4):");
int a=in.nextInt();
int i=0,j=0;
int daan=0;
switch(a) {
case 2:for(i=0;i<s;i++) {
System.out.println(q[i]+""+e[i]+""+w[i]+"=");
daan=in.nextInt();
System.out.println(daer[i]);
if(daan==daer[i]) {
System.out.println("答对了");
}
}break;
case 3: for(i=0;i<s1;i++) {
for(j=0;j<caozuoshugeshu;j++) {
System.out.print(r[i][j]+""+x[i][j]);
}
daan=in.nextInt();
System.out.println(dasan[i]);
if(daan==dasan[i]) {
System.out.println("答对了");
}
}break;
case 4:for(i=0;i<s2;i++) {
if(x2[i][0]=='+'||x2[i][0]=='-') {
if(x2[i][0]=='+')
System.out.print("("+r2[i][0]+""+x2[i][0]+""+(r2[i][1]-r2[i][0])+")"+x2[i][1]);
else
System.out.print("("+r2[i][0]+""+x2[i][0]+""+(-r2[i][1]+r2[i][0])+")"+x2[i][1]);
for(j=2;j<caozuoshugeshu2;j++) {
System.out.print(r2[i][j]+""+x2[i][j]);
}
daan=in.nextInt();
System.out.println(dasi[i]);
if(daan==dasi[i]) {
System.out.println("答对了");
}
}
else {
for(j=0;j<caozuoshugeshu2;j++) {
System.out.print(r2[i][j]+""+x2[i][j]);
}
daan=in.nextInt();
System.out.println(dasi[i]);
if(daan==dasi[i]) {
System.out.println("答对了");
}
}
}break;
}
}
public static int chutigeshu=30,zuidazhi=100,zuixiaozhi=0,caozuoshugeshu=4,caozuoshugeshu2=5;
public static Integer[] q=new Integer[30];
public static Integer[] w=new Integer[30];
public static Character[] e=new Character[30];
public static Integer[] daer=new Integer[30];
public static Integer[][] r=new Integer[chutigeshu][4];
public static Character[][] x=new Character[chutigeshu][4];
public static Integer[] dasan=new Integer[chutigeshu];
public static Integer[][] r2=new Integer[chutigeshu][5];
public static Character[][] x2=new Character[chutigeshu][5];
public static Integer[] t2=new Integer[30];
public static Integer[] t4=new Integer[30];
public static Integer[] dasi=new Integer[chutigeshu];
public static int s=0,s1=0,s2=0;
}
运行结果：
