Linked Questions

Code: cpdef values(int n): cdef size_t i cdef double * v = <double *> malloc(sizeof(double) * n) if v is NULL: abort() for i in range(n): print v[i] Output: >...

I was implementing a program related to the use of dynamic allocation in C. Testing the same piece of code on Visual Studio 2017 and on other IDEs (Dev C ++, Codeblocks, etc.) I have different ...

In this question, someone suggested in a comment that I should not cast the result of malloc. i.e., I should do this: int *sieve = malloc(sizeof(*sieve) * length); rather than: int *sieve = (int *) ...

What is the difference between doing: ptr = malloc(MAXELEMS * sizeof(char *)); And: ptr = calloc(MAXELEMS, sizeof(char*)); When is it a good idea to use calloc over malloc or vice versa?

It's known that calloc is different than malloc in that it initializes the memory allocated. With calloc, the memory is set to zero. With malloc, the memory is not cleared. So in everyday work, I ...

I created a dynamic array ,and i need to initialize all the members to 0. How can this be done in C? int* array; array = (int*) malloc(n*sizeof(int));

While learning C, I made some mistakes and printed elements of a character array that were uninitialized. If I expand the size of the array to be quite large, say 1 million elements in size and then ...

I have the following code: int *p; p = (int*)malloc(sizeof(int) * 10); but what is the default value of this int array with 10 elements? are all of them 0?

I'm trying to create a C/C++ program that dumps as much uninitialized memory as possible. The program has to be run by a local user, i.e in user mode. It does not work to use malloc: Why does malloc ...

I need help with the performance of the following code. It does a memcpy on two dynamically allocated arrays of arbitrary size: int main() { double *a, *b; unsigned n = 10000000, i; a = malloc(...

The code below calculates the dot product of two vectors a and b. The correct result is 8192. When I run it for the first time the result is correct. Then when I run it for the second time the result ...

I want to understand exactly where the global variables are stored in my program. On the stack? On the heap? Somewhere else? So for that I wrote this small code: int global_vector[1000000]; int main ...

I'm starting to learn about dynamic memory allocation in C and so far everywhere I've read the malloc() function does NOT initialize the value of the newly allocated block. Has this been changed in ...

I wanted to transfer elements from a string to another string, and hence wrote the following program. Initially, I thought that the for loop should execute till the NULL character (including it i.e) ...

I wrote a code to test to stress test the memory management of Linux and Windows OS. Just for further tests I went ahead and checked what values are present in the memory returned by malloc(). The ...