为什么就是运行不出来

[aabb]

# include <stdio.h>

#define n 5
#define m 2*n-1

typedef struct{
float weight;
int parent,lchild,rchild;
}*hufmtree;
hufmtree tree[m];
void Hufmtree()
{
int i,j,p1,p2;
float small1,small2,f,maxval=10000.00;
int wpl=0;
printf("\n\t\t请输入%d棵树(叶子)的权值\nplease:\n\n",n);

for (i=0;i<m;i++)
{ tree[i]->parent=0;
tree[i]->lchild=0;
tree[i]->rchild=0;
tree[i]->weight=0.0;
}
for (i=0;i<n;i++)
{ printf("tree[%d].weight=",i);

scanf("%f",&f);
tree[i]->weight=f;
}
for (i=n;i<m;i++)
{ p1=0; p2=0;
small1=maxval; small2=maxval;
for (j=0;j<i-1;j++)
if (tree[j]->parent==0)
if (tree[j]->weight<small1)
{ small1= tree[j]->weight;
p2=p1; p1=j;
}

else
if (tree[j]->weight<small2)
{ small2=tree[j]->weight;
p2=j;
}
tree[p1]->parent=i+1;
tree[p2]->parent=i+1;
tree[i]->lchild=p1+1;
tree[i]->rchild=p2+1;
tree[i]->weight=tree[p1]->weight+ tree[p2]->weight;
}
printf("\n");
for(i=n;i<m;i++) { printf("tree[%d]->weight=%.2f\n",i,tree[i]->weight);}
printf("\n\tWPL=%.2f\n\n\t",tree[m-1]->weight);

}

void main()
{
Hufmtree();


}

[ResearchWorld]

----------------修改后的代码-------------------------
#include <stdio.h>

#define n 5
#define m 2*n-1

typedef struct{
float weight;
int parent,lchild,rchild;
}hufmtree;
hufmtree tree[m];
void Hufmtree()
{
int i,j,p1,p2;
float small1,small2,f,maxval=10000.00;
int wpl=0;
printf("\n\t\t请输入%d棵树(叶子)的权值\nplease:\n\n",n);

for (i=0;i<m;i++)
{ tree[i].parent=0;
tree[i].lchild=0;
tree[i].rchild=0;
tree[i].weight=0.0;
}
for (i=0;i<n;i++)
{ printf("tree[%d].weight=",i);

scanf("%f",&f);
tree[i].weight=f;
}
for (i=n;i<m;i++)
{ p1=0; p2=0;
small1=maxval; small2=maxval;
for (j=0;j<i-1;j++)
if (tree[j].parent==0)
if (tree[j].weight<small1)
{ small1= tree[j].weight;
p2=p1; p1=j;
}

else
if (tree[j].weight<small2)
{ small2=tree[j].weight;
p2=j;
}
tree[p1].parent=i+1;
tree[p2].parent=i+1;
tree[i].lchild=p1+1;
tree[i].rchild=p2+1;
tree[i].weight=tree[p1].weight+ tree[p2].weight;
}
printf("\n");
for(i=n;i<m;i++) { printf("tree[%d].weight=%.2f\n",i,tree[i].weight);}
printf("\n\tWPL=%.2f\n\n\t",tree[m-1].weight);

}

void main()
{
Hufmtree();


}

[aabb]

为什么不能用 -> ?

[Binzo]

可以用的。只不过得先分配一下空间。
C++：

#include <iostream>
using namespace std;
//...
typedef struct{
	float weight;
	int parent,lchild,rchild;
}huft, *hufmtree;
//...
void Hufmtree()
{  
	int i,j,p1,p2;
	float small1,small2,f,maxval=10000.00;  
	int wpl=0;
	printf("\n\t\t请输入%d棵树(叶子)的权值\nplease:\n\n",n);

	for (i=0;i<m;i++) 
		tree[i] = new huft[m];

	for (i=0;i<m;i++)  
	{ tree[i]->parent=0;  
	tree[i]->lchild=0;  
	tree[i]->rchild=0;  
//...

[Binzo]

   for (i=0;i<m;i++) 
        tree[i] = new huft[m];

[翟码农]

定义的tree指针数组，其指针要先有指向，类似初始化。没指向一个结构体对象，又如何引用其成员变量。

[aabb]

c语言没好好学，悲剧了。。。。。[Quote=引用 5 楼 的回复:]

定义的tree指针数组，其指针要先有指向，类似初始化。没指向一个结构体对象，又如何引用其成员变量。
[/Quote]

[aabb]

可以运行了[Quote=引用 1 楼 的回复:]

----------------修改后的代码-------------------------
#include <stdio.h>

#define n 5
#define m 2*n-1

typedef struct{
float weight;
int parent,lchild,rchild;
}hufmtree;
hufmtree tree[m];
void H……
[/Quote]