I have followed a few tutorials for hashmaps in c. From the code you can probably tell I relied heavily on this implementation which has a nice follow up video where he revisits it to show how he would free the hashmap link. My problem is I can’t seem to remove my memory leaks when… Read More Freeing memory for dynamically allocated hashmap with structs as values – C

I’m trying to free all the memory allocated in testing_malloc() with the method testing_free(). I am using a Google Test project to test my code and the MemoryLeakDetector mentioned in this answer. However, when I try to free the private_data I get the following heap corruption error. HEAP CORRUPTION DETECTED: after Normal block (#835) at… Read More How do I free memory allocated to a void* member of a struct in my c project without breaking my GoogleTest project?

i need to know persian calendar holidays in react and i dont want to use paid APIs is there any way to get persian (shamsi) holidays for **free **? i need to know holidays with it’s description { 1402:[ { date: "1402/1/2", description: "عیدنوروز", }, … ] } help me to find a free api… Read More Solution to find holidays in persian calendar (shamsi)

I am a beginner in C and I encountered this weird assert failure: assuming we have this setup: #include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <assert.h> typedef struct { int id; } Struct; Struct* new_struct(int id) { Struct* s; if ((s = malloc(sizeof(Struct))) == NULL) { return NULL; } s->id = id; return s; }… Read More Weird assert failure after a struct free in C

Why this program doesn’t crash, is it undefined behaviour ? int main() { char* c; if (c) { printf("called free\n"); free (c); } else { printf("not called free\n"); } printf("not crashed\n"); c = strdup("someString"); if (c) { printf("called free\n"); free(c); c = NULL; // why is this needed for last if (c) } if (c)… Read More C calling free on not allocated memory

My code: #include <stdio.h> #include <stdlib.h> int main() { int num = 0; printf("enter a number: "); scanf("%d", &num); printf("num: %d", num); free(&num); return 0; } Why can i not release (free) the memory that holds the integer entered by the user? >Solution : According to the free(3) man page: void free(void *ptr); The free()… Read More Why does free result in a segmentation fault?

Inside main() I made pointer p and allocated it by malloc(); then I set its internal value (data) to 222. For some reason I need a function which:First: frees the memory of the pointer.Second: makes the pointer point to new structure. I did it by bar function. (It works properly and the output is correct.)… Read More Free memory by external function

I’m trying to learn about how arrays of strings can be created in C using malloc (i.e. dynamically sized arrays of strings). I can get everything working but I’m getting an "invalid pointer" error when I try to free the char* pointers stored in namesArray->data[0] and namesArray->data[1] But if I don’t use free on these… Read More Why am I getting an invalid pointer error when I try to free malloced pointers?

I was trying to free a list of integers starting from the head and knowing how many elements are in the list, but I am getting an invalid pointer error. The code is the following: int* factors = job_factorization(number, size); printf("Thread %d: job terminated. Result: ", params->thread_id); int* tmp; for (int i = 0; i… Read More Free List of Integers – C