Compilare: main.cpp: In function 'int main()': main.cpp:9:11: warning: unused variable 'd' [-Wunused-variable] int i,d,e; ^ main.cpp:9:13: warning: unused variable 'e' [-Wunused-variable] int i,d,e; ^ main.cpp:12:10: warning: unused variable 'a' [-Wunused-variable] char a,b; ^ main.cpp:12:12: warning: unused variable 'b' [-Wunused-variable] char a,b; ^