Compilare: user.cpp: In function ‘int main()’: user.cpp:39:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arc.in", "r", stdin); ^ user.cpp:40:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arc.out", "w", stdout); ^ user.cpp:41:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &c, &n); ^ user.cpp:49:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:66:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp: In function ‘int pozmax(int)’: user.cpp:34:12: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] return nr; ^ user.cpp: In function ‘int main()’: user.cpp:25:19: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] int nrmax=-1, nr; ^ user.cpp:105:28: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(a[nr].ls<3) ^