#include #include #include #include using namespace std; class Student { public: Student(){} void expression(); void again(); }; static int num=0,a,b,d,c,e,sum,result; void Student::expression() { cout<<"\n\n\n\t\t\t学生算数10道\n\n\n\n"; for(int i=0;i<10;i++) { cout<<"第"<<i+1<<"题\n"; c=rand()%4+1; switch(c) { case 1: { srand(time( NULL ) ); a=rand()%100+1; b=rand()%100+1; e=rand()%100+1; d=a+be; cout<<a<<" + "<<b<<""<<e<<" = "; } break; case 2: { srand(time( NULL ) ); a=rand()%100+1; b=rand()%100+1; e=rand()%100+1; if(a<b) { d=a; a=b; b=d; } d=a*b-e; cout<<a<<" * "<<b<<"-"<<e<<" = "; } break; case 3: {
a=rand()%8+1;
b=rand()%8+1;
e=rand()%8+1;
if(a>b)
{
d=a;
a=b;
b=d;
}
d=a*b+e;
cout<<a<<" * "<<b<<"+"<<e<<" = ";
}
break;
case 4:
{
srand(time( NULL ) );
a=rand()%9+1;
b=rand()%9+1;
e=rand()%9+1;
a=(a/b)*b;
d=a/b;
cout<<a<<" / "<<b<<"+"<<e<<" = ";
}
break;
}
cin>>result;
if(result!=d)
{
cout<<"error!\n";
ofstream outfile("错题集.txt",ios::app);
if(!outfile)
{
cerr<<"open error!"<<endl;
exit(1);
}
outfile<<a;
switch(c)
{
case 1:outfile<<"+";break;
case 2:outfile<<"-";break;
case 3:outfile<<"*";break;
case 4:outfile<<"/";break;
}
outfile<<b;
outfile<<endl;
outfile<<d;
outfile<<endl;
outfile.close();
}
else
{
cout<<"right!\n";
num++;
}
}
cout<<"\t\t\t共答对 "<<num<<" 道题\n";
}
void Student::again()
{
char ch,c;
cout<<"\t\t\t是否重做错题(按y/Y继续，任意键结束)\n";
cin>>ch;
if(num!=10)
{
if(ch=='Y'||ch=='y')
{
ifstream infile("错题集.txt",ios::in); while(!(infile>>a>>c>>b>>d).eof()) { cout<<a<<c<<b<<" = "; cin>>result; if(result==d) { cout<<"right!\n"; } else cout<<"error!\n";
}
cout<<"\t\t\t测试结束\n";
infile.close();
}
else
cout<<"\t\t\t测试结束\n"; } else cout<<"\t\t\t测试完成\n"; } int main() { Student stu; cout<<"\t\t^^^^^^^^^^欢迎进入学生算数系统^^^^^^^^^^*^^\n\n\n\n"; cout<<"^^^^^^^^^^^^^^首次测试选择y/Y,测试过选择n/N^^^^^^^^^^^^^^^^^\n"; char ch; cin>>ch; if(ch=='N'||ch=='n') stu.again(); if(ch=='Y'||ch=='y') { stu.expression(); stu.again(); } return 0; }