Sammy

#include <stdio.h>
#include <math.h>
int main()
{
int callday;
int callstart;
double callduration;
int callcost;
printf("enter callday was made(1-sunday...7-saturday)::");
scanf("%d",&callday);
                printf("\nenter callstart in 24hrs format::");
scanf("%d",&callstart);

                if (callday<=6 && callday>=2 && callstart>=600&&callstart<=1800)
                {
                                printf("chargerate for callday is 2.50");
                }
                else
              {
                    if (7==callday||1==callday)
                {
                                printf("chargerate for callday is 1.50");
                }
                        else
                                {
                                                printf("chargerate for callday is 2.00");
                                }
                 }
printf("\nenter callduration::");
scanf("%lf",&callduration);
printf("ceil value of callduration: %f\n",ceil(callduration));
callcost=(callstart)*ceil(callduration);
printf("your bill is %d", callcost);
return 0;

}