已知在文件IN.DAT中存有10个产品销售记录，每个产品销售记录由产品代码dm（字符型4位）、产品名称mc（字符型10位）、单价dj（整型）、数量sl（整型）、金额je（长整型）几部份组成。其中：金额=单价×数量，可计算得出。编程：函数readData()读取这10个销售记录并存入结构数组sell中。函数sortData()按产品名称从小到大进行排列，若产品名称相同，则按金额从大到小进行排列，最终排列结果仍存入结构数组sell中。函数writeData()把结果输出到文件OUT.DAT中。结构数据类型如下： typedef struct { 　　　　char dm[5] /*产品代码*/ 　　　　char mc[11] /*产品名称*/ 　　　　int dj /*单价*/ 　　　　int sl /*数量*/ 　　　　long je /*金额*/ } PRO PRO sell[MAX] 请根据结构数据类型自己编造有10个产品销售记录的数据文件IN.DAT。（函数readData()、sortData()和writeData()如果需要参数请自己定义，并注释说明）

4.c

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．