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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. typedef struct Flight Flight;
  5. typedef struct Flights Flights;
  6.  
  7. struct Flight {
  8.     char airline[4];
  9.     int number;
  10.     char dest[4];
  11. };
  12.  
  13. struct Flights {
  14.     Flight *flight;
  15.     int count;
  16. };
  17.  
  18. void add_flight(Flights *fl,
  19.     const char *airline, int number, const char *dest)
  20. {
  21.     int n = fl->count++;        // n is old count; fl->count is new count
  22.  
  23.     fl->flight = realloc(fl->flight,
  24.         (fl->count + 1) * sizeof(*fl->flight));
  25.  
  26.     snprintf(fl->flight[n].airline, 4, "%s", airline);
  27.     snprintf(fl->flight[n].dest, 4, "%s", dest);
  28.     fl->flight[n].number = number;
  29. }
  30.  
  31. void print_flights(const Flights *fl)
  32. {
  33.     for (int i = 0; i < fl->count; i++) {
  34.         printf("%4d. %s%d to %s\n", i + 1,
  35.             fl->flight[i].airline,
  36.             fl->flight[i].number,
  37.             fl->flight[i].dest);
  38.     }
  39.  
  40.     puts("");
  41. }
  42.  
  43. int main(void)
  44. {
  45.     Flights fl = {NULL, 0};
  46.  
  47.     add_flight(&fl, "AF", 5512, "CDG");
  48.     add_flight(&fl, "AA", 1100, "ATL");
  49.     add_flight(&fl, "LH", 6537, "FRA");
  50.     add_flight(&fl, "BA", 8821, "LHR");
  51.     add_flight(&fl, "IB", 1081, "EZE");
  52.  
  53.     print_flights(&fl);
  54.  
  55.     free(fl.flight);
  56.  
  57.     return 0;
  58. }
  59.  
  60.  
  61.  
Success #stdin #stdout 0s 4256KB
comments (?)
stdin 
Standard input is empty
stdout 
   1. AF5512 to CDG
   2. AA1100 to ATL
   3. LH6537 to FRA
   4. BA8821 to LHR
   5. IB1081 to EZE
https://ideone.com/xQ4vBt
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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