Simple linked list

#include <stdio.h>
#include <stdlib.h>

struct num{
    int content;
    struct num *next;
};
typedef struct num numbers;

void Insert(int new_content,numbers *id_num){
    numbers *mold;
    mold = malloc (sizeof (numbers));
    mold->content = new_content;
    mold->next = id_num->next;
    id_num->next = mold;
}

void PrintContent(numbers *id_num){
    if(id_num!=NULL){
        printf("%d\n",id_num->content);
        PrintContent(id_num->next);
    }
}

int main(){
    numbers head;
    numbers *list_numbers;

    list_numbers = &head;
    head.next = NULL;

    Insert(10,list_numbers);
    Insert(5,list_numbers);
    Insert(3,list_numbers);
    Insert(8,list_numbers);
    Insert(1,list_numbers);
    PrintContent(list_numbers->next);

    system("pause");
}