What is the purpose of doing this.. I've seen this in a code

Question

int* x = (int*)malloc(sizeof(int));

    int* y = (int*)malloc(sizeof(int));

Answer 1

- sizeof(int) returns the memory size of an int.

- malloc() function allocates memory dynamically on the heap and returns a void pointer

- The void pointer is then cast into an int pointer, to store it in the x or y variable

Answer 2

When allocating space to a pointer you mostly ever want to allocate to it memory with the size of what is it pointing to by typically using the sizeof operator.

https://www.geeksforgeeks.org/dynamic-memory-allocation-in-c-using-malloc-calloc-free-and-realloc/