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  1. int compare_tagnumbers(const void* a, const void* b) {
  2. const struct tag *arg1 = a;
  3. const struct tag *arg2 = b;
  4.  
  5. if (arg1->number < arg2->number) return -1;
  6. if (arg1->number > arg2->number) return 1;
  7. return 0;
  8. }
  9.  
Compilation error #stdin compilation error #stdout 0s 0KB
stdin
Standard input is empty
compilation info
prog.c: In function ‘compare_tagnumbers’:
prog.c:5:13: error: dereferencing pointer to incomplete type ‘const struct tag’
     if (arg1->number < arg2->number) return -1;
             ^~
stdout
Standard output is empty