Please help me with string splitting

Question

I'm trying to store every single string of a sentence in a array of strings. But somehow my code doesn't work as intended. I've been trying it for 3 hours and still stuck. Please help me
https://code.sololearn.com/cUF394PsX064/?ref=app

Answer 1

You forgot to include the <string.h> header for strtok(), the main() function should return an integer, and your control flow for splitting the string was wrong. Here is a corrected version:

https://code.sololearn.com/clc3hJ5l059G/?ref=app

Answer 2

If you do it that way around, you access the array out of bounds during the last iteration, where you receive a null pointer and write it into arr[ 4 ] before terminating the loop. That is already undefined behaviour and no longer a valid C program.

In this particular case on SoloLearn, "str" seems to be placed directly above "arr" on the stack. Therefore, when you write NULL into arr[ 4 ], you really overwrite the first 8 ( = sizeof( void* ) here ) bytes of "str" with the '\0' character. As a result, the first two pointers in "arr" now point to locations that contain a null terminator, and thus only the newline character is actually printed to the screen at the end.

Answer 3

Shadow yes I got it. Thank you thank you thank you thank you thank you!☺️😊

Answer 4

Shadow I feel like both I understood and not. I made a little remodeling in your code and suddenly it's not working
https://code.sololearn.com/cwvqwx34JUny/?ref=app