fork(2) download
copy 
  1. #include <stdio.h>
  2.  
  3. struct address {
  4.    char street[100];
  5.    char city[20];
  6.    char state[2];
  7.    char zip[10];
  8. };
  9. struct date {
  10.    int month;
  11.    int day;
  12.    int year;
  13. };
  14. struct user {
  15.    char login[20];
  16.    char fullname[100];
  17.    char password[30];
  18.    struct address physical_address;
  19.    struct date birthday;
  20.    int user_type;
  21.    union {
  22.       struct {
  23.          double salary;
  24.          char *clearance;
  25.       } admin;
  26.       struct {
  27.          struct date donationdate[2];
  28.          double amount[2];
  29.       } donor;
  30.       struct {
  31.          double wage;
  32.          struct date datehired;
  33.       } worker;
  34.    } userinfo;
  35. } __attribute__((packed));
  36.  
  37. struct user users[200];
  38.  
  39. int main (int argc, char *argv[]) {
  40.     printf("char: %u, int: %u, double %u, pointer: %u\n",
  41.            sizeof(char), sizeof(int), sizeof(double), sizeof(void *));
  42.     printf("%u\n", (char *)&users[10] - (char *)users
  43.                    + 1000);
  44.     printf("%u\n", (char *)&users[15].physical_address.street - (char *)users
  45.                    + 1000);
  46.     printf("%u\n", (char *)&users[20].birthday.year - (char *)users
  47.                    + 1000);
  48.     printf("%u\n", (char *)&users[20].userinfo.donor.amount[1] - (char *)users
  49.                    + 1000);
  50. }
  51.  
Success #stdin #stdout 0s 2312KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
char: 1, int: 4, double 8, pointer: 4
4380
6220
8050
8090
https://ideone.com/OoE5js
language:
C99 (gcc 8.3)
created:
10 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!