Compilare: user.c: In function ‘main’: user.c:9:10: warning: unused variable ‘c’ [-Wunused-variable] char c; ^ user.c:8:9: warning: unused variable ‘n’ [-Wunused-variable] int n,i,cf=0,f=0; ^ user.c:12:12: warning: ‘i’ is used uninitialized in this function [-Wuninitialized] while(v[i]<EOF) ^