Compilare: user.c: In function ‘main’: user.c:6:31: warning: unused variable ‘a5’ [-Wunused-variable] int l,c,rl,rc,a1,a2,a3,a4,a5,val[4][4],rez; ^ user.c:6:28: warning: unused variable ‘a4’ [-Wunused-variable] int l,c,rl,rc,a1,a2,a3,a4,a5,val[4][4],rez; ^ user.c:6:25: warning: unused variable ‘a3’ [-Wunused-variable] int l,c,rl,rc,a1,a2,a3,a4,a5,val[4][4],rez; ^ user.c:9:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&l,&c); ^