Function push

Stack/stack_implementation_using_array.c:23–32

    printf("\n");
}
void push(struct Stack *st, int x)
{
    if (st->top == st->size - 1)
        printf("Stack overflow\n");
    else
    {
        st->top++;
        st->S[st->top] = x;
    }
}
int pop(struct Stack *st)
{
    int x = -1;