All Questions
72 questions
0
votes
1
answer
62
views
Assigning values in loop body?
I am trying to build an array for which each element is 2 times the previous element. I tried using below loop but am getting error
variables 'x' and 'length' used in loop condition not modified in ...
- 21
0
votes
1
answer
114
views
Why does this C word histogram program print an overflow of 0?
I am studying from the K&R C Programming Edition and one of the exercises (1-13) is to print a word length histogram which I mostly succeeded in doing. However, there is one issue.
if (nc < ...
- 27
0
votes
0
answers
56
views
Initializing an array of pointers to structs using double pointer
Hello i am currently writing a program to emulate bouldering in real life, where there is a Wall ADT where you can store certain rocks on the wall which is represented basically as a 2d matrix. ...
- 23
0
votes
2
answers
73
views
Beginner in C: Can't properly printf first and last element in double array?
I'm trying to display a Wish List on the command line. The user enters the cost of the item, the level of priority (1-3), and whether or not it has financing options (y/n). The inputted values are put ...
- 79
0
votes
1
answer
39
views
Why is my histogram implementation segfaulting even though it shouldn't because I'm looking for values inside bound?
So, the histogram I implemented, basically takes a string as input, and divides it into words, and then the length of that word is used as the index, the output is an integer array. a[p]++, if strlen(...
- 41
0
votes
1
answer
86
views
How can I read a large set of data from a file into either a pointer to a structure or array of a structure in C
I have a data file with a known key, that is, it has many entries (devices) with the same properties and I have this structure in code to capture it.
struct deviceData{
int id;
char serial[10];
...
0
votes
1
answer
43
views
C - Linked list printing extra link
My program is printing one more link, at the beginning, than what I'm supposed to have. I can't find the problem in my debugging.
Also, I'm unsure if my sorting is optimal.
I've added the text I'm ...
- 173
1
vote
1
answer
68
views
C Losing pointer to pointer reference
Im able to find the most frequent letter, but when trying to print the elements in **words again, Im given \000 values.
I tried to store head into another variable but seems like I still lose all ...
- 151
0
votes
2
answers
175
views
C fscanf to read each word from a file not working
I already know how read word by word from a file (using fgets then strok each other), however itd like to find the simplest way and from what Ive seen fscanf, should work.
If fscanf will allocate the ...
- 173
0
votes
2
answers
48
views
C, values in array of pointers dissapear (pointers)
I seem to be losing the reference to my pointers here. I dont know why but I suspect its the pointer returned by fgets that messes this up.
I was told a good way to read words from a file was to get ...
- 173
0
votes
0
answers
432
views
BYTE data type variable value in debugger
This is in relation to my last post about finding the start of JPEGs and creating new jpg files with each new found JPEG. I am only getting part of one JPEG after running the below code (instead of ...
- 321
1
vote
4
answers
153
views
Why am I geting floating point exception?
This program worked fine when i manually iterated over 5 individual variables but when I substituted them for those arrays and for loop, I started getting floating point exceptions. I have tried ...
- 384
0
votes
0
answers
46
views
Countof macro erroneously returning 1 [duplicate]
I'm trying to print an array, however it is only printing one element of the array.
void printArr(int arr[])
{
int a;
for (a = 0; a < _countof(arr); a++)
{
printf("%i, &...
3
votes
2
answers
160
views
Problem entering values to typedef char array in C
in my code I have this typedef char:
typedef char chessPos[2];
and when I try to debug and see the the values I try to enter
chessPos* pos;
*pos[0] = 'C';
*pos[1] = '3’;
after debugging I get that ...
- 33
0
votes
1
answer
478
views
Can't assign variable length array size by scanf()
I am trying to get user input using scanf() to get the array size. There are 2 arrays, the scanf() asks for 2 numbers separated by a space. The first array's size can never be assigned but the second ...
- 1