序是在第二次和第三次的实验上改的程序，有一些多余的部分。
增加了功能就是计算答案并且判断正误，也实现了一次一次的循环，一个题目一个题目的输出
这是算错的部分
这也有答对的地方。就是答题对的数量没有实现。
我们程序的符号优先级判断用的是数组里存值得大小，然后括号优先级最大，乘除优先级居中，加减优先级最小。然后每一种符号的情况
都考虑，因为小学生的题目只能有最多有四个数，三个括号。
//2016.3.15 唐野野，胡潘华
#include<stdio.h>
#include<iostream>
#include<time.h>
#include<fstream>
#include<ostream>
#include<string>
#include<stdlib.h>
using namespace std;
#define MAX N
/*无打印功能的无括号算式*/
//int a(void)
//{
//}
/*有打印功能的无括号算式*/
//int b(void)
//{
//}
/*无打印功能的带括号的算式*/
int q(void)
{
srand((unsigned)time(NULL));
int i,j,x,a,b,c,d,n3,c2,v1,h1;
int y,y1,y2,y3,y4,y5,y6,y7,y8,y9,y0;
char t0[20],t1[20],t2[20],t3[20],t4[20],t5[20],t6[20],t7[20],t8[20],t9[20];
string a2,a3,a4,a5,a6,a7,a8,a9,a10;
char b1[10],c1,d1[10];
char a1[4]={'+','-','*','/'};
char p[10];
char p1[10],p2[10];
int N;
cout<<"请输入题目的数量！"<<endl;
cin>>i;
cout<<"请输入多少数以内的四则运算"<<endl;
cin>>N;
//cout<<"是否有乘除号？（1是，0否）"<<endl;
//cin>>x;
for(j=0;j<i;j++)
{
int yzero=rand()%3;//定义z0..z9所匹配的项目
int yone=rand()%3;
int ytwo=rand()%3;
int ythree=rand()%3;
int yfour=rand()%3;
int yfive=rand()%3;
int ysix=rand()%3;
h1=rand()%10;//定义生成表达式里数的个数
y0=rand()%N;itoa(y0,t0,10);string z0=t0;
y1=rand()%N;itoa(y1,t1,10);string z1=t1;
y2=rand()%N;itoa(y2,t2,10);string z2=t2;
y3=rand()%N;itoa(y3,t3,10);string z3=t3;
y4=rand()%N;itoa(y4,t4,10);string z4=t4;
y5=rand()%N;itoa(y5,t5,10);string z5=t5;
y6=rand()%N;itoa(y6,t6,10);string z6=t6;
y7=rand()%N;itoa(y7,t7,10);string z7=t7;
y8=rand()%N;itoa(y8,t8,10);string z8=t8;
y9=rand()%N;itoa(y9,t9,10);string z9=t9;
int l=rand()%4;
a2=z0+a1[l]+z1;
l=rand()%4;
switch(yzero){
case 0:
{a3='('+a2+')'+a1[l]+z2;break;}
case 1:
{a3=z2+a1[l]+'('+a2+')';break;}
case 3:
{a3=a2+a1[l]+z2;break;}
}
l=rand()%4;
switch(yone){
case 0:
{a4='('+a3+')'+a1[l]+z3;break;}
case 1:
{a4=z3+a1[l]+'('+a3+')';break;}
case 2:
{a4=z3+a1[l]+a3;break;}
}
l=rand()%4;
switch(ytwo){
case 0:
{a5='('+a4+')'+a1[l]+z4;break;}
case 1:
{a5=z4+a1[l]+'('+a4+')';break;}
case 2:
{a5=z4+a1[l]+a4;break;}
}
l=rand()%4;
switch(ythree){
case 0:
{a6='('+a5+')'+a1[l]+z5;break;}
case 1:
{a6=z5+a1[l]+'('+a5+')';break;}
case 2:
{a6=z5+a1[l]+a5;break;}
}
l=rand()%4;
switch(yfour){
case 0:
{a7='('+a6+')'+a1[l]+z6;break;}
case 1:
{a7=z6+a1[l]+'('+a6+')';break;}
case 2:
{a7=z6+a1[l]+a6;break;}
}
l=rand()%4;
switch(yfive){
case 0:
{a8='('+a7+')'+a1[l]+z7;break;}
case 1:
{a8=z7+a1[l]+'('+a7+')';break;}
case 2:
{a8=z7+a1[l]+a7;break;}
}
l=rand()%4;
switch(ysix){
case 0:
{a9='('+a8+')'+a1[l]+z8;break;}
case 1:
{a9=z8+a1[l]+'('+a8+')';break;}
case 2:
{a9=z8+a1[l]+a8;break;}
}
int n2=rand()%3;
switch(h1){
case 0:
{j=j-1;break;}
case 1:
{j=j-1;break;}
case 2:
{a2=z0+a1[l]+z1;
cout<<a2<<endl;break;}
case 3:
{
if(n2==2)
{a3='('+a2+')'+a1[l]+z2;
cout<<a3<<endl;break;}
if(n2==1)
{a3=z2+a1[l]+'('+a2+')';
cout<<a3<<endl;break;}
if(n2==0)
{a3=a2+a1[l]+z2;
cout<<a3<<endl;break;}
}
case 4:
{
if(n2==2)
{a4='('+a3+')'+a1[l]+z3;
cout<<a4<<endl;break;}
if(n2==1)
{a4=z3+a1[l]+'('+a3+')';
cout<<a4<<endl;break;}
if(n2==0)
{a4=z3+a1[l]+a3;
cout<<a4<<endl;break;}
}
case 5:
{
if(n2==2)
{a5='('+a4+')'+a1[l]+z4;
cout<<a5<<endl;break;}
if(n2==1)
{a5=z4+a1[l]+'('+a4+')';
cout<<a5<<endl;break;}
if(n2==0)
{a5=z4+a1[l]+a4;
cout<<a5<<endl;break;}
}
case 6:
{
if(n2==2)
{a6='('+a5+')'+a1[l]+z5;
cout<<a6<<endl;break;}
if(n2==1)
{a6=z5+a1[l]+'('+a5+')';
cout<<a6<<endl;break;}
if(n2==0)
{a6=z5+a1[l]+a5;
cout<<a6<<endl;break;}
}
case 7:
{
if(n2==2)
{a7='('+a6+')'+a1[l]+z6;;
cout<<a7<<endl;break;}
else if(n2==1)
{a7=z6+a1[l]+'('+a6+')';
cout<<a7<<endl;break;}
else if(n2==0)
{a7=z6+a1[l]+a6;
cout<<a7<<endl;break;}
}
case 8:
{
if(n2==2)
{a8='('+a7+')'+a1[l]+z7;
cout<<a8<<endl;break;}
if(n2==1)
{a8=z7+a1[l]+'('+a7+')';
cout<<a8<<endl;break;}
if(n2==0)
{a8=z7+a1[l]+a7;
cout<<a8<<endl;break;}
}
case 9:
{
if(n2==2)
{a9='('+a8+')'+a1[l]+z8;
cout<<a9<<endl;break;}
if(n2==1)
{a9=z8+a1[l]+'('+a8+')';
cout<<a9<<endl;break;}
if(n2==0)
{a9=z8+a1[l]+a8;
cout<<a9<<endl;break;}
}
}
}
return 0;
}
int liunianji(void)
{
int h;
cout<<"是否要给六年级同学出题："<<endl;
cin>>h;
if(h==1)
{
srand((unsigned)time(NULL));
int i,j,x,a,b,c,d,n3,c2,v1,h1;
int y,y1,y2,y3,y4,y5,y6,y7,y8,y9,y0;
char t0[20],t1[20],t2[20],t3[20],t4[20],t5[20],t6[20],t7[20],t8[20],t9[20];
string p2,p3,p4,p5,p6,p7,p8,p9,p10;
char b1[10],c1,d1[10];
char a1[4]={'+','-','*','/'};
char a2[10];
char aj;
int a4[4]={1,1,2,2};
int a5[10];
char p[10];
char p1[10],o[10];
int N;
cout<<"请输入题目的数量！"<<endl;
cin>>i;
int b2[10],a3[100],s1[100];
cout<<"请输入多少数以内的四则运算"<<endl;
cin>>N;
//cout<<"是否有乘除号？（1是，0否）"<<endl;
//cin>>x;
for(j=0;j<i;j++)
{
int yzero=rand()%3;//定义z0..z9所匹配的项目
int yone=rand()%3;
int ytwo=rand()%3;
//定义生成表达式里数的个数
y0=rand()%N;itoa(y0,t0,10);string z0=t0;
y1=rand()%N;itoa(y1,t1,10);string z1=t1;
y2=rand()%N;itoa(y2,t2,10);string z2=t2;
y3=rand()%N;itoa(y3,t3,10);string z3=t3;
y4=rand()%N;itoa(y4,t4,10);string z4=t4;
y5=rand()%N;itoa(y5,t5,10);string z5=t5;
int l=rand()%4;
p2=z0+a1[l]+z1;
if(a1[l]=='+')
{b2[0]=y0+y1;}
if(a1[l]=='-')
{b2[0]=y0-y1;}
if(a1[l]=='*')
{b2[0]=y0*y1;}
if(a1[l]=='/')
{b2[0]=y0/y1;}
a5[0]=a4[l];
a2[0]=a1[l];
l=rand()%4;
a5[1]=a4[l];
a2[1]=a1[l];
switch(yzero){
case 0:
{
p3='('+p2+')'+a1[l]+z2;
if(a1[l]=='+')
{b2[1]=b2[0]+y2;}
if(a1[l]=='-')
{b2[1]=b2[0]-y2;}
if(a1[l]=='*')
{b2[1]=b2[0]*y2;}
if(a1[l]=='/')
{b2[1]=b2[0]/y2;}
}
break;
case 1:
{p3=z2+a1[l]+'('+p2+')';
if(a1[l]=='+')
{b2[1]=b2[0]+y2;}
if(a1[l]=='-')
{b2[1]=b2[0]-y2;}
if(a1[l]=='*')
{b2[1]=b2[0]*y2;}
if(a1[l]=='/')
{b2[1]=b2[0]/y2;}
}break;
case 2:
{ p3=p2+a1[l]+z2;
a5[1]=a4[l];
if(a5[0]>=a5[1])
{if(a1[l]=='+')
{b2[1]=b2[0]+y2;}
if(a1[l]=='-')
{b2[1]=b2[0]-y2;}
if(a1[l]=='*')
{b2[1]=b2[0]*y2;}
if(a1[l]=='/')
{b2[1]=b2[0]/y2;}
}
if(a5[0]<a5[1])
{
int n1;
n1=a5[0];
a5[0]=a5[1];
a5[1]=n1;
aj=a2[0];
a2[0]=a2[1];
a2[1]=aj;
if(a2[0]=='+')
{
if(a1[l]=='*'){
b2[1]=y1*y2;
b2[1]=b2[1]+y0;
}
if(a1[l]=='/'){
b2[1]=y1/y2;
b2[1]=b2[1]+y0;
}
}
if(a2[0]=='-')
{
if(a1[l]=='*'){
b2[1]=y1*y2;
b2[1]=b2[1]-y0;
}
if(a1[l]=='/'){
b2[1]=y1/y2;
b2[1]=b2[1]-y0;
}
}
}
}
break;
}
l=rand()%4;
a5[2]=a4[l];
a2[2]=a1[l];
switch(yone){
case 0:
{p4='('+p3+')'+a1[l]+z3;
if(a1[l]=='+')
{b2[2]=b2[1]+y3;}
if(a1[l]=='-')
{b2[2]=b2[1]-y3;}
if(a1[l]=='*')
{b2[2]=b2[1]*y3;}
if(a1[l]=='/')
{b2[2]=b2[1]/y3;}
}
case 1:
{p4=z3+a1[l]+'('+p3+')';
if(a1[l]=='+')
{b2[2]=b2[1]+y3;}
if(a1[l]=='-')
{b2[2]=b2[1]-y3;}
if(a1[l]=='*')
{b2[2]=b2[1]*y3;}
if(a1[l]=='/')
{b2[2]=b2[1]/y3;}}
case 2:
{p4=z3+a1[l]+p3;
a5[2]=a4[l];
if(a5[0]>a5[2])
{if(a1[l]=='+')
{b2[2]=b2[1]+y2;}
if(a1[l]=='-')
{b2[2]=b2[1]-y2;}
if(a1[l]=='*')
{b2[2]=b2[1]*y2;}
if(a1[l]=='/')
{b2[2]=b2[1]/y2;}
}
if(a5[0]==a5[2])
{
if(a1[l]=='+'){
if(a2[0]=='+'){
if(a2[1]=='+'){
b2[2]=y0+y1;
b2[2]=b2[2]+y3;
b2[2]=b2[2]+y3;
}
if(a2[1]=='-'){
b2[2]=y0+y1;
b2[2]=b2[2]-y3;
b2[2]=b2[2]+y3;
}
}
if(a2[0]=='-'){
if(a2[l]=='+'){
b2[2]=y0-y1;
b2[2]=b2[2]+y3;
b2[2]=b2[2]+y3;
}
if(a2[l]=='-'){
b2[2]=y0-y1;
b2[2]=b2[2]-y3;
b2[2]=b2[2]+y3;
}
}
}
if(a1[l]=='-'){
if(a2[0]=='+'){
if(a2[l]=='+'){
b2[2]=y0+y1;
b2[2]=b2[2]+y3;
b2[2]=b2[2]-y3;
}
if(a2[l]=='-'){
b2[2]=y0+y1;
b2[2]=b2[2]-y3;
b2[2]=b2[2]-y3;
}
}
if(a2[0]=='-'){
if(a2[l]=='+'){
b2[2]=y0-y1;
b2[2]=b2[2]+y3;
b2[2]=b2[2]-y3;
}
if(a2[1]=='-'){
b2[2]=y0-y1;
b2[2]=b2[2]-y3;
b2[2]=b2[2]-y3;
}
}
}
if(a1[l]=='*'){
if(a2[1]=='+'){
if(a2[0]=='*')
{int ax=y0*y1;int bx=y2*y3;b2[2]=ax+bx;}
if(a2[0]=='/')
{int ax=y0/y1;int bx=y2*y3;b2[2]=ax+bx;}}
if(a2[1]=='-'){
if(a2[0]=='*')
{int ax=y0*y1;int bx=y2*y3;b2[2]=ax-bx;}
if(a2[0]=='/')
{int ax=y0/y1;int bx=y2*y3;b2[2]=ax-bx;}}
if(a2[1]=='*'||'/')
{b2[2]=b2[1]*y3;}
}
if(a1[l]=='/'){
if(a2[1]=='+'){
if(a2[0]=='*')
{int ax=y0*y1;int bx=y2/y3;b2[2]=ax+bx;}
if(a2[0]=='/')
{int ax=y0/y1;int bx=y2/y3;b2[2]=ax+bx;}}
if(a2[1]=='-'){
if(a2[0]=='*')
{int ax=y0*y1;int bx=y2/y3;b2[2]=ax-bx;}
if(a2[0]=='/')
{int ax=y0/y1;int bx=y2/y3;b2[2]=ax-bx;}}
if(a2[1]=='*'||'/')
{b2[2]=b2[1]/y3;}
}
}
if(a5[0]<a5[2])
{
if(a1[l]=='*'){
if(a2[0]=='+'){
if(a2[1]=='+'){
b2[2]=y3*y2;
b2[2]=b2[2]+y0;
b2[2]=b2[2]+y1;
}
if(a2[1]=='-'){
b2[2]=y3*y2;
int xz=y0+y1;b2[2]=xz-b2[2];
}
}
if(a2[0]=='-'){
if(a2[l]=='+'){
b2[2]=y3*y2;
int at=y0-y1;
b2[2]=y2+b2[2];
}
if(a2[l]=='-'){
b2[2]=y3*y2;
int ap=y0-y1;
b2[2]=y2-b2[2];
}
}
}
if(a1[l]=='/'){
if(a2[0]=='+'){
if(a2[1]=='+'){
b2[2]=y3/y2;
b2[2]=b2[2]+y0;
b2[2]=b2[2]+y1;
}
if(a2[1]=='-'){
b2[2]=y3/y2;
int xz1=y0+y1;b2[2]=xz1-b2[2];
}
}
if(a2[0]=='-'){
if(a2[l]=='+'){
b2[2]=y3/y2;
int at1=y0-y1;
b2[2]=y2+b2[2];
}
if(a2[l]=='-'){
b2[2]=y3/y2;
int ap1=y0-y1;
b2[2]=y2-b2[2];
}
}
}
}
}
break;
}
h1=rand()%2+3;
int n2=rand()%3;
switch(h1){
case 2:
{p2=z0+a1[l]+z1;
cout<<p2<<endl;
s1[j]=b2[0];}break;
case 3:
{
if(n2==2)
{p3='('+p2+')'+a1[l]+z2;
cout<<p3<<endl;}
if(n2==1)
{p3=z2+a1[l]+'('+p2+')';
cout<<p3<<endl;}
if(n2==0)
{p3=p2+a1[l]+z2;
cout<<p3<<endl;}
s1[j]=b2[1];
}
break;
case 4:
{
if(n2==2)
{p4='('+p3+')'+a1[l]+z3;
cout<<p4<<endl;break;}
if(n2==1)
{p4=z3+a1[l]+'('+p3+')';
cout<<p4<<endl;break;}
if(n2==0)
{p4=z3+a1[l]+p3;
cout<<p4<<endl;break;}
s1[j]=b2[2];
}break;
}
cout<<"请输入你的答案："<<endl;
cin>>v1;
a3[j]=v1;
if(a3[j]==s1[j])
{
int g1=g1+1;
cout<<"答对了，真棒！！"<<endl;
cout<<"你已答对了"<<g1<<"道题"<<endl;
}
if(a3[j]!=s1[j])
{
j=j-1;
cout<<"答错了，还需多加努力！"<<endl;
}
}
}
return 0;
}
/*有打印功能的带括号算式*/
//int p(void)
//{
//}
int main(void)
{
int n,n1;
cout<<"是否有括号？（1有，0否）"<<endl;
cin>>n1;
if(n1==1)
{
cout<<"是否打印？（1存入文档，0否）"<<endl;
cin>>n;
if(n==0)
{
q();
}
//if(n==1)
// {
// p();
//
// }
// }
//if(n1==0)
//{
// cout<<"是否打印？（1存入文档，0否）"<<endl;
//cin>>n;
//if(n==1)
//{
//b();
//}
//if(n==0)
//{
//a();
// }
//}
}
liunianji();
return 0;
}
每天晚上在考研自习室编程，还编得不好，我的编程基础有点薄弱，会好好学习的。附上工作照一张。
http://www.cnblogs.com/hph1313/p/5296215.html