Compilare: user.cpp: In function ‘int main()’: user.cpp:54:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] prov[i] = ant[c]; ^ user.cpp:55:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] cnt[i] = cnt[ant[c]]+1; ^ user.cpp:57:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(cnt[i]>cnt[ant[w[i][len[i]]]]) ^ user.cpp:58:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant[w[i][len[i]]] = i; ^ user.cpp:30:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("text3.in","r",stdin); ^ user.cpp:31:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("text3.out","w",stdout); ^ user.cpp:33:14: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s+1); ^ user.cpp:36:22: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s+1); ^ user.cpp:49:18: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s+1); ^ /tmp/ccdC7Hxk.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.