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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. // Define a type to hold the score together with the name of the player
  5. typedef struct
  6. {
  7.     char name[42];
  8.     int score;
  9. } PlayerStats;
  10.  
  11. // Make a compare function to be used by qsort
  12. int cmpfunc (const void * a, const void * b){
  13.     const PlayerStats* pA = a;
  14.     const PlayerStats* pB = b;
  15.     if (pA->score > pB->score) return -1;
  16.     if (pA->score < pB->score) return 1;
  17.     return 0;
  18. }
  19.  
  20. // A function for printing the players and their score
  21. void print_stats(PlayerStats *ps, int n)
  22. {
  23.     for(int i=0; i<n; ++i) printf("%s : score=%d\n", ps[i].name, ps[i].score);
  24. }
  25.  
  26. int main(){
  27.     // Make an array of players with scores.
  28.     PlayerStats player_stats[3] = {{"p1", 17}, {"p2", 9}, {"p3", 42}};
  29.     size_t numElements = sizeof player_stats / sizeof player_stats[0];
  30.     size_t sizeElement = sizeof player_stats[0];
  31.  
  32.     printf("Unsorted:\n");
  33.     print_stats(player_stats, numElements);
  34.  
  35.     // Use the standard qsort for sorting the array
  36.     qsort(player_stats, numElements, sizeElement, cmpfunc);
  37.  
  38.     printf("Sorted:\n");
  39.     print_stats(player_stats, numElements);
  40.  
  41.     return 0;
  42. }
  43.  
Success #stdin #stdout 0s 9424KB
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stdin
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Standard input is empty
stdout
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Unsorted:
p1 : score=17
p2 : score=9
p3 : score=42
Sorted:
p3 : score=42
p1 : score=17
p2 : score=9
https://ideone.com/HMgDbn
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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