Compilare: user.cpp: In function ‘int bin_search(int, int, int)’: user.cpp:43:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(((a[m]<=val)&&(a[m+1]>val))||(m==a.size()-1)) ^ user.cpp: In function ‘int main()’: user.cpp:66:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i =0;i<a.size()-1;i++) ^ user.cpp: In function ‘int bin_search(int, int, int)’: user.cpp:53:1: warning: control reaches end of non-void function [-Wreturn-type] } ^