Compilare: user.cpp: In function ‘int main()’: user.cpp:21:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(x);i++ ) ^ user.cpp:57:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(x);i++ ) ^ user.cpp:11:5: warning: variable ‘ko’ set but not used [-Wunused-but-set-variable] int ko=0,gil=0,st_2pct=1,prim=1; ^