Thread: How to allocate dynamic memory for structure in my code

How to allocate dynamic memory for structure in my code

I know how to use malloc to allocate dynamic memory

Code:

int *ptr = (int *) malloc(4 * sizeof (int));
if (ptr == NULL) {
    /* Memory could not be allocated
} else {
    /* Allocation succeeded.  Do something.  */
    free(ptr);  
    ptr = NULL; /* The pointed-to-data  must not be used again,
                   unless re-assigned by using malloc
                   again. */
}

How to allocate dynamic memory for the structure in code ?

Code:

#include <stdio.h>struct Person

 { int N; float height; }p1;

void show_person(struct Person p) {
  printf( "person %d is %f meters tall.\n", p.N, p.height );
}

void change_height(struct Person *p, float new_height) {
  p->height = new_height;
}

int main(void) {
    
    p1.N = 1;
    p1.height = 2.0;
    
   show_person(p1);
   change_height(&p1, 1.9)  ;
   show_person(p1);

  return 0;
}