Compilare: user.cpp: In function ‘int main()’: user.cpp:24:9: warning: variable ‘n’ set but not used [-Wunused-but-set-variable] int n,m,t,i,j,x,l1=0,l2=0; ^ user.cpp:24:15: warning: unused variable ‘i’ [-Wunused-variable] int n,m,t,i,j,x,l1=0,l2=0; ^ user.cpp:24:17: warning: unused variable ‘j’ [-Wunused-variable] int n,m,t,i,j,x,l1=0,l2=0; ^ /tmp/ccuckWvi.o: In function `main': user.cpp:(.text.startup+0x80): warning: the `gets' function is dangerous and should not be used.