定义了一个结构体，里面含有三个字符串，想通过GETS（）来对他们实习动态赋值：

结构体为：#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
#define NAME_LEN 20
#define ABBREV_LEN 20
#define GROUP_LEN 20
#define N 11

typedef struct{
               char name[NAME_LEN];
               char abbrev[ABBREV_LEN];
               char group[GROUP_LEN];
               double value;
}unit;

unit s[N]={{"miles","mi","distance",1609.3},{"kilometers","km","distance",1000},{"yards","yd","distance",0.9144},
{"meters","m","distance",1},{"quarts","qt","liquidvolume",0.94635},{"liters","l","liquidvolume",1},{"gallons","gal","liquidvolume",3.7854},
{"milliliters","ml","liquidvolume",0.001},{"kilograms","kg","mass",1},{"grams","g","mass",0.001},{"slugs","slugs","mass",0.14594}};

然后在一个字函数中对结构体的一个新定义变量进行赋值： int scanf_unit(unit *a)
  {
      int d,j=100;
      gets(a->name);gets(a->abbrev);gets(a->group);这里是否有错误？我的语法通过了，但是结果不，并且一定出现在赋值问题上经过我的检查，程序太大，完整的不方便给出，请大家看看解决一下吧，谢谢。
      scanf("lf",&a->value);      
          for(d=0;d<11;d++)
         if(strcmp(a->name,s[d].name)==0&&strcmp(a->abbrev,s[d].abbrev)==0&&strcmp(a->group,s[d].group)==0)
             j=1;
      return(j);
  }

出现的错误是：
scanf:floating point formats not linked
abnormal program termination

gets(a->name);gets(a->abbrev);gets(a->group);//此句应该没问题；
scanf("lf",&a->value); //此句就有很大问题；“%”呢？

scanf:floating point formats not linked
abnormal program termination
据说是个tc的bug,哈哈