Compilare: user.cpp: In function ‘bool cmp(vec, vec)’: user.cpp:20:9: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a.ord==b.ord) ^ user.cpp: In function ‘int main()’: user.cpp:33:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii=0;ii<c[i].cod.size();ii++) ^ user.cpp:36:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii=0;ii<c[i].cod.size();ii++) ^ user.cpp: In function ‘bool cmp(vec, vec)’: user.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^