Compilare: main.cpp: In function 'void Permheap(int)': main.cpp:3:11: warning: unused variable 'first' [-Wunused-variable] #define s first ^ main.cpp:36:9: note: in expansion of macro 's' int s,d; ^ main.cpp:4:11: warning: unused variable 'second' [-Wunused-variable] #define d second ^ main.cpp:36:11: note: in expansion of macro 'd' int s,d; ^