Compilare: user.c: In function ‘nrcifrezero’: user.c:6:16: warning: unused variable ‘t’ [-Wunused-variable] int nr = 0,t = -1; ^ user.c: In function ‘main’: user.c:30:46: warning: unused variable ‘x’ [-Wunused-variable] int p,a = 0,b = 1000000000,z,nr = 0,cx,y,x; ^ user.c:30:44: warning: unused variable ‘y’ [-Wunused-variable] int p,a = 0,b = 1000000000,z,nr = 0,cx,y,x; ^ user.c:30:41: warning: unused variable ‘cx’ [-Wunused-variable] int p,a = 0,b = 1000000000,z,nr = 0,cx,y,x; ^ user.c:30:34: warning: unused variable ‘nr’ [-Wunused-variable] int p,a = 0,b = 1000000000,z,nr = 0,cx,y,x; ^ user.c:30:32: warning: unused variable ‘z’ [-Wunused-variable] int p,a = 0,b = 1000000000,z,nr = 0,cx,y,x; ^ user.c:30:17: warning: unused variable ‘b’ [-Wunused-variable] int p,a = 0,b = 1000000000,z,nr = 0,cx,y,x; ^ user.c:30:11: warning: unused variable ‘a’ [-Wunused-variable] int p,a = 0,b = 1000000000,z,nr = 0,cx,y,x; ^ user.c:31:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&p); ^