# include & ltiostream & gt
# include & ltcstdlib & gt
Use namespace std
Invalid Fu Hao (integer x)
{
if(x = = 0)printf("+")；
if(x = = 1)printf("-")；
if(x = = 2)printf(" * ")；
}
int main()
{
int a，b，t，p，flag
Int score = 0;
int n，I；
Cycle:
System ("CLS");
Cout & lt& lt "How many questions do you want to answer?" & lt& ltendl
CIN & gt； & gtn；
Cout & lt& lt "Start the test!" & lt& ltendl
for(I = 0； I & ltn；; i++)
{
Cout & lt& lt "first"
a = rand()% 10；
b = rand()% 10；
If (a<b)
flag = rand()% 3；
cout & lt& lta；
Fu Hao (national flag);
cout & lt& ltb & lt& lt" = ";
CIN & gt； & gtt；
If (flag ==0)
{
If (t==a+b)
Else cout & lt& lt "Wrong answer! The correct answer is: "
}
if(flag== 1)
{
If (t==a-b)
Else cout & lt& lt "Wrong answer! The correct answer is: "
}
if(flag==2)
{
If (t==a*b)
Else cout & lt& lt "Wrong answer! The correct answer is: "
}
}
Cout & lt& lt "The total number of correct questions is:"
Cout & lt& lt "Do you want to continue? 1. Continue 2. Quit "
CIN & gt； & gtt；
If(t== 1) goes to the loop;
Else cout & lt& lt "Welcome! Goodbye! " & lt& ltendl
System ("suspended");
Returns1;
}