Compilare: user.cpp: In function ‘float distanta(int, int)’: user.cpp:43:13: warning: variable ‘o’ set but not used [-Wunused-but-set-variable] int x,y,o; ^ user.cpp:44:12: warning: variable ‘foo’ set but not used [-Wunused-but-set-variable] double foo=0; ^ user.cpp: In function ‘int main()’: user.cpp:71:17: warning: unused variable ‘x’ [-Wunused-variable] int x,y; ^ user.cpp:71:19: warning: unused variable ‘y’ [-Wunused-variable] int x,y; ^ user.cpp:87:12: warning: unused variable ‘goo’ [-Wunused-variable] double goo=1.0/3.0; ^ user.cpp:88:12: warning: unused variable ‘goo1’ [-Wunused-variable] double goo1=100.0/3.0; ^