lassie% cc scanf4.c lassie% lassie% a.out Enter three integers: 123 456 789 n1 = 123, n2 = 456, n3 = 789, rv = 3 lassie% lassie% a.out Enter three integers: 123 456 aaa n1 = 123, n2 = 456, n3 = 0, rv = 2 lassie% lassie% a.out Enter three integers: 123 aaa 789 n1 = 123, n2 = 0, n3 = 0, rv = 1 lassie% lassie% a.out Enter three integers: abc n1 = 0, n2 = 0, n3 = 0, rv = 0 lassie% lassie% a.out Enter three integers: ^Dn1 = 0, n2 = 0, n3 = 0, rv = -1 lassie%