Compilare: user.cpp: In function ‘int calc_min_max()’: user.cpp:27:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:33:5: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations] gets(s+1); ^ In file included from /usr/include/c++/5/cstdio:42:0, from user.cpp:1: /usr/include/stdio.h:638:14: note: declared here extern char *gets (char *__s) __wur __attribute_deprecated__; ^ user.cpp:33:5: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations] gets(s+1); ^ In file included from /usr/include/c++/5/cstdio:42:0, from user.cpp:1: /usr/include/stdio.h:638:14: note: declared here extern char *gets (char *__s) __wur __attribute_deprecated__; ^ user.cpp:33:13: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations] gets(s+1); ^ In file included from /usr/include/c++/5/cstdio:42:0, from user.cpp:1: /usr/include/stdio.h:638:14: note: declared here extern char *gets (char *__s) __wur __attribute_deprecated__; ^ user.cpp:37:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[s[i]]++; ^ user.cpp:39:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(f[maxx]-f[minn]<=1) ^ user.cpp:39:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(f[maxx]-f[minn]<=1) ^ user.cpp:43:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[s[i]]--; ^ user.cpp:44:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[minn]++; ^ user.cpp:30:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("smooth2.in","r",stdin); ^ user.cpp:31:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("smooth2.out","w",stdout); ^