I wanna code a program that sums ages continuously - c++

Question

As the title states, I need to write a program that sums ages without asking the user to enter a specific number of ages to add beforehand. User shall just keep entering the desired ages until he writes "OK". Then, the program will stop and give the result. I've tried creating a string and when the string is equal to "OK" the program stops. However, I cannot figure it out.
int x,age;
int total=0;
int nofpeople=0;
int average=0;
string check;
cout<<"Enter the ages and when you're done write 'OK'." << endl;
while(check!="OK")
{
cin>>x;
if(x>0)
{
age=x;
nofpeople++;
total=total+age;
average=total/nofpeople;
}
else
{
check="OK";
}
}
cout<<"Number of people you have entered=" << nofpeople << endl;
cout<<"Sum of ages=" << total<< endl;
cout<<"Average of ages=" <<average;
return 0;
I have a code like this but this code obviously give result for the cases that I input to x "OK" or some randow letters like"adsfasd".I want it to work specificly for "OK".

Answer 1

I think something like this should work, I used istringstream class to convert the ages into integers, with error checking in case it doesn't work.
int x,age;
int total=0;
int nofpeople=0;
int average=0;
string check;
cout<<"Enter the ages and when you're done write 'OK'." << endl;
while(check!="OK")
{
string temp;
cin>>temp;
istringstream iss(temp);
iss >> x;
if(x>0)
{
age=x;
nofpeople++;
total=total+age;
average=total/nofpeople;
}
else if (temp.compare("OK") == 0)
{
check="OK";
}
else
{
cerr << "Invalid or negative number entered" << endl;
}
}
cout<<"Number of people you have entered=" << nofpeople << endl;
cout<<"Sum of ages=" << total<< endl;
cout<<"Average of ages=" <<average;
return 0;