water week 1 problem

Question

I'm stuck in water week 1 problem. My program works according to the check50 but I have it gives me 3 errors which I have no clue what they mean:

:( rejects "foo" minutes /expected prompt for input, not exit code of 0 :( rejects "" minutes /expected output, not a prompt for input :( rejects "123abc" minutes /expected prompt for input, not exit code of 0

Now I'm not too familiar with these errors, but it seems that the check50 tried in an input "foo", then "" and then "123abc" which resulted probably in my program giving them a 0 value. Now, I though in the instruction, there was no need for loops. Can someone help me out with this? I'm fairly new to programmation.

Here is my code:

#include <stdio.h>
int main(void)
{
     int bottle, minutes, num_bottles;

     printf("Minutes: \n");
     scanf("%d", &minutes);

     bottle = 12;
     num_bottles = bottle * minutes;
     printf("bottles: %d\n", num_bottles);
}

Answer to my own problem:

#include <stdio.h>
#include <cs50.h>

int main(void)
{
     int bottle = 12;
     int num_bottles;

     printf("minutes: \n");
     int minutes = GetInt();

    if (minutes > 0)
     {         
      num_bottles = bottle * minutes;
      printf("bottles: %d\n", num_bottles);
     }
    else
     {
      num_bottles = bottle * minutes;
      printf("retry: ")
     }
     return 0;
}

Answer 1

Like I edited in my own problem and comment, I solved it.

 #include <stdio.h>
 #include <cs50.h>

 int main(void)
{
 int bottle = 12;
 int num_bottles;

 printf("minutes: \n");
 int minutes = GetInt();

if (minutes > 0)
 {         
  num_bottles = bottle * minutes;
  printf("bottles: %d\n", num_bottles);
 }
else
 {
  num_bottles = bottle * minutes;
  printf("retry: ")
 }
 return 0;
}

Answer 2

Not really a good solution. What happens if someone enters bad input twice? You need a solution that will keep prompting for valid input until it is entered. Time to discover what a while loop is.

If this answers your question, please click on the check mark to accept. Let's keep up on forum maintenance. ;-)

Answer 3

i have a trouble with "GetInt" it was written on my code, throws me an error(use of undeclared identifier 'GetInt') and of course i add a cs50.h, tried everything without result.

note* i update cs50 from terminal.

the solution that i found was, delete everything and start again and work perfect and past the check50.

i hope this help in the future to others :)