Compilare: user.cpp: In function ‘int make_number(char*)’: user.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(b);i++) ^ user.cpp: In function ‘int main()’: user.cpp:87:5: warning: ‘f’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=f;i<f+maxi;i++) ^ user.cpp:80:20: warning: ‘g’ may be used uninitialized in this function [-Wmaybe-uninitialized] g++; ^