Compilare: main.cpp: In function 'int zero(int)': main.cpp:9:16: warning: unused variable 'i' [-Wunused-variable] int cnt=0, i; ^ main.cpp: In function 'int main()': main.cpp:18:11: warning: unused variable 'n' [-Wunused-variable] int p,n,cnt2=0,cnt5=0,start=2,end=500000000,m,aux; ^ main.cpp:18:13: warning: unused variable 'cnt2' [-Wunused-variable] int p,n,cnt2=0,cnt5=0,start=2,end=500000000,m,aux; ^~~~ main.cpp:18:20: warning: unused variable 'cnt5' [-Wunused-variable] int p,n,cnt2=0,cnt5=0,start=2,end=500000000,m,aux; ^~~~ main.cpp:18:51: warning: unused variable 'aux' [-Wunused-variable] int p,n,cnt2=0,cnt5=0,start=2,end=500000000,m,aux; ^~~