Question

c prog prob

Answer 1

@slotema

Answer 2

here's the task....it has to read the first line of the file and copy every word into a 2d array
but for some reason.....the array is empty.....

Answer 3

i tried two methods
initially find the no.of character's in the file in the line 1
and create a dynamic array and copy the contents in to it.......(linear_array)

then
method 1:
copy every char in to array ...if a space is encountered increment row pointer of 2d array
method 2 :
replace every space in the linear_array and replace it with \0
then copy each string into each row

both of them dint work

the array is either empty or copies a single word
here's the test file
used gcc

Answer 4

You replace every space with '\0', Suppose the file contains "Hello, World". In your loop, you ask for strlen(p), which will be 6 on the first iteration (matching "Hello,"). This one is copied just fine. The second iteration however, p points to '\0' (what used to be the space). So strlen(p) is 0 the second iteration (and all other iterations). So strlen does NOT include the '\0'.

Btw, don't forget to free the memory you malloced

Answer 5

no i need it later so i cant free it yet.......that's not the entire prog
thanks....but y dint the other method work like copying the array char by char?

Answer 6

the one i commented out

Answer 7

i think i got ur xplanation but when i used strlen(p) i got a result of 5
like strlen("\0askldghal"\0") should give a zero?

Answer 8

The problem with the commented code is the the else-part of the for-loop. You first increment k before assigning anything. Because of this, array[j][0] (the start of the string) will remain 0.

strlen("\0askl...") will indeed give 0 length.

You could also use the strtok function from the standard library to split a string into words (see: http://www.cplusplus.com/reference/cstring/strtok/ ).