Compilare: user.cpp: In function ‘int main()’: user.cpp:7:22: warning: unused variable ‘b’ [-Wunused-variable] char a[1000000], b[1000][1000]; ^ user.cpp:8:10: warning: unused variable ‘nr’ [-Wunused-variable] long nr, i=0, k=0, s=0, st=0, cont1=0, cont2=0; ^ user.cpp:8:35: warning: unused variable ‘cont1’ [-Wunused-variable] long nr, i=0, k=0, s=0, st=0, cont1=0, cont2=0; ^ user.cpp:8:44: warning: unused variable ‘cont2’ [-Wunused-variable] long nr, i=0, k=0, s=0, st=0, cont1=0, cont2=0; ^ user.cpp:9:11: warning: unused variable ‘N’ [-Wunused-variable] short N; ^