Week 2 walkthroughs ages.c has a bug?

Question

The ages.c code doesn't seem to account for a scenario where user enters a negative integer when prompted for ages.

   {
       for (int i = 0; i < n; i++)
       {
           printf("Age of person #%i: ", i + 1);
           ages[i] = GetInt();   
       }
   }

What type of loop could one add to reprompt user for a positive integer?

Answer 1

Lots of options here. To me, the simplest would be a do-while loop.

do
{
    ages[i] = GetInt();   
    if ( ages <= 0 )
    {
        // prompt user to try again.
    }
} 
while ( ages[I] <= 0 );

It will keep looping back until you have a number greater than 0. The IF loop will prompt the user to try again only if the answer is 0 or less.

Answer 2

you can use do ... while to validate user input to avoid negative values.

{
       for (int i = 0; i < n; i++)
       {
           do
           {
               printf("Age of person #%i: ", i + 1);
               ages[i] = GetInt();   
            }
            while (ages[I] <= 0);
       }
   }