一个小问题，文件

[zhangyanli]

为什么度不出来浮点数：
5
0.3
0.1
0.4
0.2
0.0
代码如下：
#include<stdio.h>
int main()
{
int count;
double a,b,c,d,e;
FILE* pf=fopen("E:\\huffman.txt","r+");
if(pf==NULL)
printf("file open failed!");
fscanf(pf,"%d",&count);
fscanf(pf,"%f",&a);
fscanf(pf,"%f",&b);
fscanf(pf,"%f",&c);
fscanf(pf,"%f",&d);
fscanf(pf,"%f",&e);

printf("%d\t%f\t%f\t%f\t%f\t%f\t",count,a,b,c,d,e);
}
读出来的是这样：
5 -92559604109209606000000000000000000000000000000000000000000000.000000
-92559603955960049000000000000000000000000000000000000000000000.000000 -9255960
4147521992000000000000000000000000000000000000000000000.000000 -925596040517410
20000000000000000000000000000000000000000000000.000000 -92559592117431994000000
000000000000000000000000000000000000000.000000 Press any key to continue

[ForestDB]

一句话,怎么写,怎么读...

[csdn5211]

存的时候怎么存的？是按浮点数格式吗？

[babyvox1999]

该成float a,b,c,d,e;

[liyinlei]

因为 double a,b,c,d,e;
double型需要用 fscanf(pf,"%lf",&b);

float 才是 “%f”

[kojie_chen]

楼上说的是

[winddarkdancer]

俺是来学习滴,一起努力!up^up

[zhangyanli]

我是楼主：

个人认为，不管关“%f”还是“%lf”的事，好像跟文件的存储有关，要是用浮点数写进去再读就可以。
可是又不知道为什么？

哪位高人帮一下忙啊 。。。

[butwang]

读的时候fscanf(pf,"%f",&b); 遇到空格或回车换行就认为读了一个数（字符串），然后按类型转换为指定的数字

[gezichong]

#include <stdio.h>
int main()
{
int count;
float a,b,c,d,e;
FILE* pf=fopen("E:\\huffman.txt","r+");
if(pf==NULL)
printf("file open failed!");
fscanf(pf,"%d",&count);
fscanf(pf,"%f",&a);
fscanf(pf,"%f",&b);
fscanf(pf,"%f",&c);
fscanf(pf,"%f",&d);
fscanf(pf,"%f",&e);

printf("%d\t%f\t%f\t%f\t%f\t%f\t",count,a,b,c,d,e);
}