Compilare: main.cpp: In function 'void read()': main.cpp:14:13: warning: unused variable 'j' [-Wunused-variable] int x,i,j; ^ main.cpp: In function 'int main()': main.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<elemente.size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:26:9: warning: unused variable 'i' [-Wunused-variable] int i,j,x; ^ main.cpp:26:11: warning: unused variable 'j' [-Wunused-variable] int i,j,x; ^ main.cpp:26:13: warning: unused variable 'x' [-Wunused-variable] int i,j,x; ^