Compilare: user.cpp: In function ‘int main()’: user.cpp:9:10: warning: unused variable ‘s’ [-Wunused-variable] char s[1000000],*p,c; ^ user.cpp:9:22: warning: unused variable ‘p’ [-Wunused-variable] char s[1000000],*p,c; ^ user.cpp:10:9: warning: unused variable ‘i’ [-Wunused-variable] int i,nr=0,nr1=0,ok=0; ^