Compilare: user.cpp: In function ‘int main()’: user.cpp:88:20: warning: unused variable ‘l’ [-Wunused-variable] unsigned n=0,i,l,x,y,j=0; ^ user.cpp: In function ‘void da(unsigned int, unsigned int)’: user.cpp:27:14: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] unsigned p,w; ^ user.cpp:39:10: warning: ‘w’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=w+1;i<sz;i++) ^ /tmp/ccO128di.o: In function `main': user.cpp:(.text.startup+0x4e): warning: the `gets' function is dangerous and should not be used.