c - Segmentation fault at passing array of integers to function -

i have pasted code here, @ statement *stack_ptr->s3++ = element; segmentation fault occurring. can please let me know should change eliminate error?

typedef int stack_elmnt_int; typedef struct {   stack_elmnt *s1;   stack_elmnt_int *s3;   int length;   int top; } stack;   int push_stack_int(stack *stack_ptr, stack_elmnt_int element) {     int i=0;      if (stack_full(stack_ptr))         printf("\nstack full.");     else{         *stack_ptr->s3++ = element;     } } void main() {     int arr[128], arr_num = sizeof(arr)/sizeof(int);     //after input user arr     //partial code pasted here      for(i=0;i<arr_num ;i++)         push_stack_int(&stack_1,arr[i]); } 

statement (*stack_ptr->s3++ = element;) segmentation fault occuring,

probably don't allocate memory s3.

 *stack_ptr->s3++ = element;               ^                | assigning garbage location  

can please let me know should change eliminate error?

in main() function after declaration of stack_1 allocate memory s3 ( should allocate memory s1 ), like:

stack_1.s3 = calloc(max_number_of_element, sizeof( stack_elmnt_int)); 

additionally, should not increment s3 pointer. (you loss starting address) like:

stack_ptr->s3[top++] = element;