Array Torments

I Keep Getting a Funny Result when i cout<<array[100]/customers(50)*100 the result is some weird number, 11478562 when it should be more like 20 or something in that region

Post some code. :)

Here Is the Code

Code:

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#include <iostream>
using namespace std;
int Another();
int main()
{

        int code;
        int code_arr[100];
        int counter_arr[100];
        int customers=0;
        int i;

        for(i=0; i<100; ++i)
        {
                code_arr[i]=0;
            counter_arr[i]=0;
        }

        while(Another())
        {

        cout<<"Enter Your Zip Code:";
        cin>>code;
        cout<<endl;

        for(i=0; i<100; ++i)
        {
                if(code_arr[i]==code)
                {
                        counter_arr[i]+=1;
                    cout<<"Added Counter!!"<<endl;
                        ++customers;
                        break;
                }
       
        }
        if(i>=100)
                for(i=100; i>0; --i)
                {
                        if(code_arr[i]==0)
                        {
                                code_arr[i]=code;
                            counter_arr[i]+=1;
                                cout<<"Added Address!!"<<endl;
                                ++customers;
                                break;
                        }
                }



        }

        for(int l=0; l<100; ++l)
                if(code_arr[l]>0)
                {

                        cout<<"Zip Code #"<<l+1<<endl
                            <<"Zip Code #"<<code_arr[l]<<endl
                        <<"Number Of Zip Codes from this area : # "<<counter_arr[l]<<endl
                                <<"Total &#37; of total customers : "<<t<<endl<<endl;
                       
                }
                cout<<"Total Customers All Up : "<<customers<<endl<<endl;



               

        return 0;
}
int Another()
{
        int response;
        cout<<endl;

        cout<<"Would You Like to Process Another Zip Code : ";
        cin>>response;

        cout<<endl;


        return response;
}

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the last part is the worry, and i forgot to add it!!

here is the problem

Code:

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<<"Total &#37; of total customers : "<<counter_arr[l]/customers*100<<endl<<endl;

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Given that all these variables are int, I would expect you to get 0 as an answer. (Assuming counter_arr[l] < customers, that division will give 0, and 0*100 is 0.)

i see, beginners ignorance, and lack of sleep, thanks for that....
i see i got to use doubles i forgot that principal, maths in c++ is a different thing, you got to be aware of doubles and int etc as well

Code:

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for(i=100; i>0; --i)
{
    if(code_arr[i]==0)

---

This causes out-of-bounds access.

Code:

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<<"Total &#37; of total customers : "<<counter_arr[l]/customers*100<<endl<<endl;

---

Because of integer division this should always print 0: smaller / larger = 0 if smaller and larger are integers.
You can try multiplying by 100 first, or cast customers or counter_arr[l] or both to double to force floating point division.

An easier way to write this kind of program is to use std::map (something like):

Code:

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    map<int, int> zip;
    do {
        cout<<"Enter Your Zip Code:";
        cin>>code;
        cout<<endl;
        ++zip[ code]; //this does the logic of your two for-loops
    } while (Another());
    //print statistics

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