Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:29:19: error: invalid conversion from ‘rec*’ to ‘size_t {aka unsigned int}’ [-fpermissive] qsort(v+1, v+1+lg, comp); ^ user.cpp:29:28: error: invalid conversion from ‘bool (*)(rec, rec)’ to ‘size_t {aka unsigned int}’ [-fpermissive] qsort(v+1, v+1+lg, comp); ^ user.cpp:29:28: error: too few arguments to function ‘void qsort(void*, size_t, size_t, __compar_fn_t)’ In file included from /usr/include/c++/4.8/cstdlib:72:0, from /usr/include/c++/4.8/bits/stl_algo.h:59, from /usr/include/c++/4.8/algorithm:62, from user.cpp:2: /usr/include/stdlib.h:761:13: note: declared here extern void qsort (void *__base, size_t __nmemb, size_t __size, ^ user.cpp:18:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("graf.in", "r", stdin); ^ user.cpp:19:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("graf.out", "w", stdout); ^ user.cpp:20:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &m, &x, &y); ^ user.cpp:23:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^