Compilare: main.cpp: In function 'void createPref()': main.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<cuv.size();i++) ~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<sir.size();i++) ~^~~~~~~~~~~ main.cpp:46:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(lung==cuv.size()-1) ~~~~^~~~~~~~~~~~~~