求以孩子兄弟表示法存储的森林的叶子结点数

算法

int Leaves(Tree t){
	if(t==NULL) return 0;
	if(t->fch==NULL) return 1+Leaves(t->nsib);
	else return Leaves(t->fch) +Leaves(t->nsib);
}

测试环境

#include<stdio.h> 
#include<stdlib.h>
#include<string.h>
#define maxsize 100
#define ElemType char 
typedef struct node{
	ElemType date;
	struct node *fch,*nsib;
}Node,*Tree;

//abd##eh###cfi#m###g#jk#ln####

Tree CreateBiTree();
void Traverse(Tree p);
int Leaves(Tree t);

int main(){
	Tree t = CreateBiTree();
//	Traverse(t);
	printf("%d",Leaves(t));
	return 0;
}

int Leaves(Tree t){
	if(t==NULL) return 0;
	if(t->fch==NULL) return 1+Leaves(t->nsib);
	else return Leaves(t->fch) +Leaves(t->nsib);
}

void Traverse(Tree p){
	if(p==NULL){
		return;
	}
	else{
		Traverse(p->fch);
		printf("%c",p->date);
		Traverse(p->nsib);
	}
	return;
}

Tree CreateBiTree(){
	Tree p;
	char a;
	scanf("%c",&a);
	if(a=='#')
	p=NULL;
	else{
		p=(Tree)malloc(sizeof(Node));
		p->date=a;
		p->fch=CreateBiTree();
		p->nsib=CreateBiTree();
	}	
	return p;
}