Compilare: main.cpp: In function 'void print()': main.cpp:32:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < vc.size () && i < vl.size (); i ++) ~~^~~~~~~~~~~~ main.cpp:32:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < vc.size () && i < vl.size (); i ++) ~~^~~~~~~~~~~~ main.cpp:34:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;i < vc.size (); i ++) ~~^~~~~~~~~~~~ main.cpp:36:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i < vl.size (); i ++) ~~^~~~~~~~~~~~ main.cpp:27:22: warning: unused variable 'j' [-Wunused-variable] void print(){int i , j; ^