What is the proper way to use "do while" loop for Pset1 water

Question

I am a complete newbie to CS50 and programming. I entered in my basic code and ran the program and CS50check and it was all good. The I tried many times to include this do while loop, reviewed notes, walkthrough's, etc. and I just don't get it or see it.

Here is the revised code but it still doesn't work after many variations. i just don't see the problem.

#include <cs50.h> 
#include <stdio.h> 
int main(void) 
{ 
    do 
    { 
        printf("How long was your shower in minutes "); 
        int minutes = get_int(); 
        int bottles = minutes * 12; 
        printf("You used %i bottles of water for your shower\n", bottles); 
    } 
    while (minutes > 1); 
}

Answer 1

The do while loop tells the program to do these things in order:

1. Do something - The code you put between the curly braces {statement(s)} will run at least once.
2. The while condition between the parenthesis (condition) will then test to see if the condition is true. In your case the condition is true while minutes < 1.
3. If the condition is true the loop will return to step one and perform the statement(s) again. If it is false it will break out of the loop and carry on to the next line.

What you want to do is get the number of minutes from the user and then check the input, while the input is invalid you want to get the number of minutes from the user again.

So you may have to ask the user for input a number of times depending on their response. This will be the part of your code contained in the while loop because you want to keep getting user input and checking it until it is valid.