C語言程式設計（第三版) 第六章 實驗題 2 任務6
阿新 • • 發佈：2018-12-18
#include <iostream>
#include<iomanip>
#include<time.h>
using namespace std;
int main()
{
int flag,n1,n2;
char m;
double i=0,l,a=0,x,z,x1,x2,b;
do
{
CXW:
srand(int (time(0)));
x1=rand()%10+1;
x2=rand()%10+1;
n1=rand()%4;
n2=rand()%4;
if (n1==1)
m='+';
else if (n1==2)
m='-';
else if (n1==3)
m='*';
else if (n1==0)
m='/';
switch (m)
{
case '+':
cout << x1<<"+"<<x2<<"="<<"?";
z=x1 + x2;
cin >>x;
i++;
if (x==z)
{
switch (n2)
{
case 1:
cout <<"Very good!"<<endl;
break;
case 2:
cout <<"Excellent!"<<endl;
break;
case 3:
cout <<"Nice work!"<<endl;
break;
case 0:
cout <<"Keep up the goof work!"<<endl;
break;
}
flag=0;
a++;
}
else
{
switch (n2)
{
case 1:
cout <<"No. Please try again."<<endl;
break;
case 2:
cout <<"Wrong. Try once more."<<endl;
break;
case 3:
cout <<"Don't give up"<<endl;
break;
case 0:
cout <<"Not correct.Keep trying."<<endl;
break;
}
flag=0;
}
break;
case '-':
cout << x1<<"-"<<x2<<"="<<"?";
z=x1 - x2;
cin >>x;
i++;
if (x==z)
{
switch (n2)
{
case 1:
cout <<"Very good!"<<endl;
break;
case 2:
cout <<"Excellent!"<<endl;
break;
case 3:
cout <<"Nice work!"<<endl;
break;
case 0:
cout <<"Keep up the goof work!"<<endl;
break;
}
flag=0;
a++;
}
else
{
switch (n2)
{
case 1:
cout <<"No. Please try again."<<endl;
break;
case 2:
cout <<"Wrong. Try once more."<<endl;
break;
case 3:
cout <<"Don't give up"<<endl;
break;
case 0:
cout <<"Not correct.Keep trying."<<endl;
break;
}
flag=0;
}
break;
case '*':
cout << x1<<"*"<<x2<<"="<<"?";
z=x1 * x2;
cin >>x;
i++;
if (x==z)
{
switch (n2)
{
case 1:
cout <<"Very good!"<<endl;
break;
case 2:
cout <<"Excellent!"<<endl;
break;
case 3:
cout <<"Nice work!"<<endl;
break;
case 0:
cout <<"Keep up the goof work!"<<endl;
break;
}
flag=0;
a++;
}
else
{
switch (n2)
{
case 1:
cout <<"No. Please try again."<<endl;
break;
case 2:
cout <<"Wrong. Try once more."<<endl;
break;
case 3:
cout <<"Don't give up"<<endl;
break;
case 0:
cout <<"Not correct.Keep trying."<<endl;
break;
}
flag=0;
}
break;
case '/':
cout << x1<<"/"<<x2<<"="<<"?";
z=x1 / x2;
cin >>x;
i++;
if (x==z)
{
switch (n2)
{
case 1:
cout <<"Very good!"<<endl;
break;
case 2:
cout <<"Excellent!"<<endl;
break;
case 3:
cout <<"Nice work!"<<endl;
break;
case 0:
cout <<"Keep up the goof work!"<<endl;
break;
}
flag=0;
a++;
}
else
{
switch (n2)
{
case 1:
cout <<"No. Please try again."<<endl;
break;
case 2:
cout <<"Wrong. Try once more."<<endl;
break;
case 3:
cout <<"Don't give up"<<endl;
break;
case 0:
cout <<"Not correct.Keep trying."<<endl;
break;
}
flag=0;
}
break;
}
if (flag==0&&i<10)
goto CXW;
else
{
l=i;
i=0;
b=a;
a=0;
cout <<b<<" "<<b/l*100<<"%"<<endl;
}
}
while (b/l*100<75);
return 0;
}