Compilare: user.cpp: In function ‘void val(str&)’: user.cpp:37:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ha$[lin].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:123:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] acr.v[acr.v[0]]=sir[po]; ^ user.cpp:135:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();j++) ^ user.cpp:150:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<deal[i].size();j++) ^ user.cpp:151:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=j+1;k<deal[i].size();k++) ^ user.cpp:165:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[*it].size();j++) ^ user.cpp:169:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<sirmod.size();j++) ^ /tmp/ccSlSAnG.o: In function `main': user.cpp:(.text.startup+0xc9): warning: the `gets' function is dangerous and should not be used.