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Thanks!

Hi, all, just a quick question -- will isdigit() return true for the null char at the end of a string?

Hmm. This seems straightforward, and yet this gets me "warning: passing argument 1 of ‘strcpy’ makes pointer from integer without a cast"--for both arguments.
strcpy(*((*flights)[i].origin),...

Thanks for pointing that out--you likely saved me a good deal of hair-pulling time. I know I don't need to cast malloc, but the instructor makes us do it anyway. The compiler may be God, but the prof...

OK, I think I understand--like so:
flights = (Flight **)malloc((size_t)*num_flights*sizeof(Flight));How would I use this in a for loop? Simply replacing i with flights doesn't seem to work, but...

Hi, all--
I'm working on an airline reservation program, and I think I've gotten myself all turned around with respect to the pointers. Here's the relevant code:


typedef struct
{
int number;...

Hm, you're right. Rereading the assignment, I noticed this bit: "Since you will be dynamically allocating the arrays in read_file() the addresses of the original char** of last_names and first_names...

Hi, all--
This program is meant to read a list of names and ages from a file and store them in arrays. Unfortunately, I've only gotten as far as dynamically allocating the arrays, and I'm already...

Thank you all very much for the help and your patience. It's working perfectly now. I probably sound like a bit of an idiot--that's because the course I'm currently taking is pretty much my first...

OK, thank you, that makes sense. I've changed it back to:


while(wordptr[i] != NULL)
{
wordptr[i] = strtok(NULL, " \n");
i++;
}

And the output is as follows:

Hi, all--
I'm writing a program to reverse a string word by word, e.g. "some words" becomes "words some", and I'm having some trouble getting it to ignore the null portion of the array. Here's my...

Ah, of course! That's fixed it, thank you much.

Hi, all--
I'm writing a program to find the longest common prefix of two words (e.g. input "department" and "depart", get "depart" back; input "global" and "glossary", get "glo" back), and when I...

Thanks so much, that's fixed it. Eternal gratitude, coming right up. :D

Hmm. I'm not sure I understand. Just before the while loop begins, there's this line:

fscanf(inp, "%lf%lf%lf", &num_passengers, &commute, &gas_used);
Is there some reason I'm not aware of that...

Hi, all--this time I've got a program that's supposed to calculate passenger efficiency in passenger kilometers per liter, given an input file that lists number of passengers, total commuting...

Thank you! That's fixed it. In the instructor's executable, entering a filename for a file that doesn't exist causes a segmentation fault, so it's not something I need to worry about in this context....

Hi, it's me again. *waves* I'm having some trouble, and I could really use a fresh set (or sets) of eyes.

This program is supposed to take two lists of integers of the same length ended by -1 and...

Thank you both very much, it's working perfectly now.

The comments refer to the previous if statement, i.e. "check neighbor up and to the left" refers to if(life[row-1][column-1]=='X'). And...

Thank you! It's fixed now.

I wonder if I might trouble you further to take a look at my update_life function, as it doesn't seem to be working. It's meant to count the number of Xs in neighboring...

Hi--I'm trying to implement Conway's Game of Life on a 10x10 board (with borders), and I'm having a bit of trouble. At this point, it seems most likely that said trouble lies in either my display...