A.函數(shù)的定義不能嵌套,但函數(shù)調(diào)用可以嵌套B.函數(shù)的定義可嵌套,但函數(shù)的調(diào)用不能嵌套C.函數(shù)的定義和調(diào)用均不能嵌套D.函數(shù)的定義和調(diào)用均可嵌套
A.if(s1==s2) B.if(s1=s2) C.if(strcmp(s1,s2)) D.if(strcmp(s1,s2)==0)
A.3 B.0 C.9 D.-12