Compilare: main.cpp: In function 'int main()': main.cpp:10:9: warning: unused variable 'c' [-Wunused-variable] int c,h,o,ans=0; ^ main.cpp:10:11: warning: unused variable 'h' [-Wunused-variable] int c,h,o,ans=0; ^ main.cpp:10:13: warning: unused variable 'o' [-Wunused-variable] int c,h,o,ans=0; ^