yang686526

求助：未处理的异常c0000005
求助：未处理的异常c0000005
typedef struct datafield_string
{
char *fieldname;
char *fieldval;

};
typedef struct datafield_double
{
char *fieldname;
double fieldval;

};
typedef struct datafield_long
{
char *fieldname;
long fieldval;

};
typedef struct pipeextentiondata
{
datafield_string pipetype;
datafield_string dn;
datafield_double d;
datafield_double b;
datafield_double high;
datafield_double length;
datafield_long index;

};

//数据初始化
pipeextentiondata pipedata=
{
{"管道类型","焊接钢管"},
{"公称直径","dn20"},
{"管道外径",0.0},
{"管道壁厚",0.0},
{"管道标高",0.0},
{"管段长度",0.0},
{"管段编号",1}
};

acedgetstring(0,"\n管道类型:",pipedata.pipetype.fieldval);
acutprintf("\n管道类型：%s",pipedata.pipetype.fieldval);
以上代码编译通过，运行时输入后出错，错误提示：“未处理的异常c0000005(access violation writing 0x182b174)，地址：77c17ad8h”
请高手指教该如何解决，谢谢！！！
以上代码简化为如下代码，编译通过，错误依旧
char *abc;
acedgetstring(0,"\n管道类型：",abc);
char abc[256]="";
acedgetstring(0,"\n管道类型：",abc);
acedgetstring()需要一个分配过内存初始化过的char*，函数内部不负责分配内存，而是直接赋值，给一个未经初始化的无效指针赋值，当然会出错了
问题解决谢谢高手指点