Thread: searching thru a c++ class array

so i have gone thru my c++ class array and entered all the info needed.....

class student
{
private:
int ID;
etc....
};

student stan[10];

i have asked the user to enter his/her id # how do i check to verify that the # entered exists in the array stan[10]? (i know a for loop will start the process..)

stan
thanks

You could make a function similar to this:

Code:

bool CheckForDupes(int iTest) 
{ 
bool RetVal=false; 
for(int i=0;i<10;i++) //of course, i<? would be your array size 
{ 
if(stan[i].GetID()==iTest) 
{ 
RetVal=true; //duplicate found; 
} 
} 
return(RetVal); 
}

then use this function like this:

Code:

int NewID, i=0; 
while(i<10)
{ 
   cin>>NewID; 
   if(CheckForDupes(NewID)) 
   { 
     cout<<"Enter another ID. This one already exists."<<"\n"; 
    } 
    else 
    { 
       stan[i].SetID(NewID); 
       i++;
    }
}

This is basically what I PM'ed you except that I added the while loop here for a little more clarity. Hope this helps.