Compilare: user.cpp: In function ‘int main()’: user.cpp:50:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carti2.out", "w", stdout); ^ user.cpp:62:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &T); ^ user.cpp:64:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d %d", &N, &H, &L, &G); ^ user.cpp:67:49: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &book[i].h, &book[i].l); ^ user.cpp:40:15: warning: ‘best’ may be used uninitialized in this function [-Wmaybe-uninitialized] int x = u ^ v; ^ user.cpp:88:35: note: ‘best’ was declared here int mask, comp, tmp, max = 0, best; ^