Compilare: user.cpp: In function ‘void citire()’: user.cpp:12:23: warning: variable ‘y1’ set but not used [-Wunused-but-set-variable] int x,y,k,i,j, x1,y1; ^~ user.cpp: In function ‘void afis()’: user.cpp:47:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0; j<v[i].size(); j++) ~^~~~~~~~~~~~ user.cpp: In function ‘void euler_it(int)’: user.cpp:66:9: warning: unused variable ‘nod’ [-Wunused-variable] int nod,i,ok; ^~~ user.cpp:66:13: warning: unused variable ‘i’ [-Wunused-variable] int nod,i,ok; ^ user.cpp:66:15: warning: unused variable ‘ok’ [-Wunused-variable] int nod,i,ok; ^~ user.cpp: In function ‘int main()’: user.cpp:87:11: warning: unused variable ‘aux’ [-Wunused-variable] int i,aux; ^~~