#include "stdstuff.h"

int main () {

    int counters[10] = {0}, i;
    double rainfall;
    ifstream fin("data.txt");

    for (;;) {

        fin >> rainfall;

        if (fin.fail()) {
            break; // must be end of file (file is assumed to be error free)
        }
    
        // compute counter array index and increment the element
        i = (int) (rainfall / 5);
        if (i > 9) {
            i = 9;
        }
        counters[i]++;  // same as "counters[i] = counters[i] + 1"

    } // end for (;;)

    cout << endl << "      Rainfall       Occurrences" << endl
             << "---------------------------------" << endl;
    for (i = 0; i < 9; i++) {
        cout << setw(4) << (i * 5) << " to "
             << setw(2) << ((i * 5) + 4) << ".999 mm"
             << setw(10) << counters[i] << endl;
    }
    cout << "  45 and over mm " << setw(10) << counters[i] << endl;

    pause();
    return 0;
}