Compilare: main.cpp: In function 'int main()': main.cpp:11:12: warning: statement has no effect [-Wunused-value] 11 | in >> in; | ~~~^~~~~ main.cpp:12:9: warning: 'in' may be used uninitialized [-Wmaybe-uninitialized] 12 | switch(in){ | ^~~~~~ main.cpp:8:10: note: 'in' was declared here 8 | char in; | ^~