/* alistirma */
#include<stdio.h>

int main ()
{
    int  k = 0, tg = 0;
    float s = 0, tk = 0, ts = 0, g = 0;
    
    while (g != -1) {
    printf("Kac galonbenzin harcandı ( cıkıs icin -1 ) : ");
    scanf("%f",&g);
    tg += g;
    printf("kac kilometre yol alindi: ");
    scanf("%d",&k);
    s = (float) k / g;
    tk += (float) s;
    printf("kilometre / galon : %f\n\n",s);
}
   ts = (float) tk / tg;
   printf("toplam ortalama kilometre/galon : %f\n",ts);
   system("PAUSE");
   return 0;
}