Compilare: user.cpp: In function ‘int getdigit()’: user.cpp:14:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i;j<a.size();j++) ^ user.cpp: In function ‘void con(int, int, int, int)’: user.cpp:47:13: warning: unused variable ‘f’ [-Wunused-variable] int f=0; ^ user.cpp: In function ‘int main()’: user.cpp:70:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a.size();i++) ^ user.cpp:79:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a.size();i++) ^