Compilare: user.cpp: In function ‘int main()’: user.cpp:15:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (k>0 && ss[k+1]!=ss[i]) k=urm[k]; ^ user.cpp:15:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (k>0 && ss[k+1]!=ss[i]) k=urm[k]; ^ user.cpp:16:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (ss[k+1]==ss[i]) k++; ^ user.cpp:17:10: warning: array subscript has type ‘char’ [-Wchar-subscripts] urm[i]=k; ^ user.cpp:21:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (k>0 && ss[k+1]!=s[i]) k=urm[k]; ^ user.cpp:21:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (k>0 && ss[k+1]!=s[i]) k=urm[k]; ^ user.cpp:22:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (ss[k+1]==s[i]) k++; ^ user.cpp:23:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (k==m) sol.push_back(i-m),k=urm[k]; ^ user.cpp:26:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<sol.size();i++) printf("%d ",sol[i]); ^ user.cpp:9:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin); ^ user.cpp:10:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out","w",stdout); ^ user.cpp:11:11: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(ss+1); m=strlen(ss+1); ^ user.cpp:12:10: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s+1); n=strlen(s+1); ^ /tmp/ccLtH2S8.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.