Compilare: main.cpp: In function 'int main()': main.cpp:23:14: warning: unused variable 'ch' [-Wunused-variable] 23 | char ch = (char)(i); | ^~ main.cpp:28:14: warning: unused variable 'ch' [-Wunused-variable] 28 | char ch = (char)(i); | ^~ main.cpp:33:14: warning: unused variable 'ch' [-Wunused-variable] 33 | char ch = (char)(i); | ^~