Compilare: user.cpp: In function ‘void Euler(int)’: user.cpp:47:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<L[k].size(); j++) ^ user.cpp: In function ‘void Rezolva()’: user.cpp:62:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j; ^ user.cpp:62:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void Afisare()’: user.cpp:89:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok,i,j; ^ user.cpp:89:14: warning: unused variable ‘j’ [-Wunused-variable] int ok,i,j; ^