Compilare: main.cpp: In function 'int main()': main.cpp:19:9: warning: unused variable 'm' [-Wunused-variable] int n, m, src, dest; ^ main.cpp:19:12: warning: unused variable 'src' [-Wunused-variable] int n, m, src, dest; ^~~ main.cpp:19:17: warning: unused variable 'dest' [-Wunused-variable] int n, m, src, dest; ^~~~