Compilare: user.cpp: In function ‘void euler(int)’: user.cpp:11:9: warning: unused variable ‘i’ [-Wunused-variable] int i,nou; ^ user.cpp: In function ‘int main()’: user.cpp:51:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ciclu.size();i++) ^ user.cpp:72:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ciclu.size();i++) ^ user.cpp:90:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ciclu.size();i++) ^