Questions tagged [allocation]
The allocation tag has no usage guidance.
7
questions
2
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2answers
1k views
What will realloc() do if the contiguous memory location is already occupied?
Consider-
char* name1 = malloc(4 * sizeof(char));
name1 = "Mike";
Now if i want to put "Mike Smith" in the same string "name1", I need 6 more bytes of memory (one for the space and 5 for "Smith". ...
1
vote
1answer
2k views
When we free a dynamically allocated memory, what happens to the pointer pointing at it?
After watching section on "Dynamically allocated memory" (from Week 4) several times, I still have a question unanswered.
Consider the following code-
// Allocates 4 bytes of memory on heap and ...
0
votes
3answers
145 views
Week 4, Section : Dynamic Memory Allocation
After watching Dynamic Memory allocation section
and reading this i am a bit confused,
if declaring an array
int array[10];
and allocating using malloc int* parray = malloc(10 * sizeof(int));...
0
votes
1answer
24 views
Regarding week4's lecture video
l have just seen the week4's lecture video where it has been cleared out that string is actually char* under the hood!
Then, I encountered and example where why he tries to copy a string by assigning ...
0
votes
1answer
82 views
Memory allocation when working with files in C
When you fopen a file in C, and you write to it, how is there memory waiting for the additional data? What happens if the file doesn't have free space after it?
1
vote
1answer
722 views
Memory allocation: recommended practices
I'm rambling a little with hacker 2 (the passwords') and, in the meantime, gained some insight about pointers, mem-alloc, 'valgrind', etc... It's been a truly great, challenging experience.
But, ...
0
votes
2answers
155 views
memory leak on the stack?
Just wondering if anyone can explain why we are concerned with memory leak in the heap (freeing for example a char *), but we are not concerned with freeing variables that are in the stack in the main ...