#include<stdio.h>
#include <string.h>
#define POWER_RECORD_SEND_COUNT 10

typedef unsigned short  WORD;

typedef struct powerRecord
{
    WORD power;//DWORD power;//Johnson--120216
    WORD time;
}PowerRecord;

PowerRecord  rcArray[POWER_RECORD_SEND_COUNT]=
{
             {0x0001,0x0002},
             {0x0001,0x0002},  
             {0x0001,0x0002},
             {0x0001,0x0002},
             {0x0001,0x0002},
             {0x0001,0x0002},
             {0x0001,0x0002},
             {0x0001,0x0002},
             {0x0001,0x0002},
             {0x0001,0x0002},            
};
unsigned char data[40];
int main(void)
{
   unsigned char i=0;
  memcpy(data,&rcArray,40);
  if(data[0]==0x00)
  printf("this is test right");
  else
  printf("this is test error");
  getchar();                                         
  return 0;  
}
为什么打印出来的是this is test error， memcpy为什么会出错。复制过去data【0】应该是0x00吧

memcpy(data,&rcArray,40);
改成
memcpy(data,rcArray,40); 试试？

应该把data[1]输出看看，貌似是大端字节序和小端字节序顺序的问题吧

打印出来是0

那data[0]应该就是0x01了

PowerRecord这个占4字节， WORD power; WORD time;各占2字节，拷贝到data是char类型，所以data【0】，data【1】存WORD power就这样顺序排下去

为什么data[0]是等于0呢，取第一个字节应该是0x0001，memcpy(data,&rcArray,40);
改成memcpy(data,rcArray,40);

楼主机器主机字节序是小端的，0x0001在内存里是01 00这样的，要是大端的就是00 01，所以楼主给我分吧。

楼上说的不错，是小端格式了谢谢了给分了