为什么这个工会删除第一个记录数组在c code？ [英] Why this union is deleting the 1st records in arrays in the c code?

问题描述

下面是我的头文件之一，它由4种不同结构的工会模板。

Here is one of my header file which consists of a union template with 4 different structures.

#define MAX 3


union family
{
  struct name      /*for taking the name and gender of original member*/
     {
      unsigned char *namess;
      unsigned int gender;
      union family *ptr_ancestor; /*this is a pointer to his ancestors details*/
     }names;

  struct male /*for taking the above person's 3 male ancestors details if he is male*/
     {
       unsigned char husb_names[3][20];
       unsigned char wife_names[3][20];
       unsigned int wife_status[3];
     }male_ancestor;

  struct unmarry /*for taking the above person's 3 female parental ancestors if she is female and unmarried*/
    {
      unsigned int mar;
      unsigned char parental_fem[3][20];
      unsigned int marit_status[3];
    }fem_un;

  struct marry /*for taking 3 parental-in-laws details if she is female and married*/
    {
      unsigned int mar;
      unsigned char in_law_fem[3][20];
      unsigned int in_marit_status[3];
    }fem_marr;

};
extern union family original[MAX]; /*for original person*/
extern union family ancestor_male[MAX]; /*used if he is male for storing his male ancestor details*/
extern union family ancestor_female[MAX]; /*used if she is female*/



extern int x;

我的目的是让一个人的名字，性别和存储人的任何3个男/女祖先根据人的性别，婚姻状况，如下所示。

My aim is to get a person name and gender and store the person's any 3 male/female ancestors according to the person's gender and marital status as follows..

我的意思是 MAX 将有3个成员，每家都会有3个祖先。这些祖先会由性别来决定，如下列条件相应的成员：

I mean that MAX will have 3 members and each will be having 3 ancestors. These ancestors will be determined by the gender the corresponding member like the following conditions:

• 如果男性然后用结构男性


• 如果未婚女性使用结构和...离婚


• 如果已婚女性使用结构结婚

• if male then use struct male
• if female unmarried use struct unmarry
• if female married use struct marry

结构名称为成员的名字和性别的人，我们必须采取祖先和点 * ptr_ancestor 到相应的祖先阵列（ancestormale或ancestorfemale）。

struct name is for the member name and gender for whom we have to take ancestors and point the *ptr_ancestor to that corresponding ancestor array (ancestormale or ancestorfemale).

在内存中的对象是工会。好。我的节目将具有工会的阵列，事实上。阵列的每个元件可以是在联合使用不同的结构。
在这里，我们要小心在分配指针，否则我们可能会在运行时失去我们的年长者的记录。

The object in memory is a union. Ok. My program will have an array of unions, in fact. Each element of the array may be using a different structure in the union. Here we should be careful in assigning the pointer or else we may loose our older person records at run time.

如果可能的话请告诉我怎么去1元即细节。 原[0] 即使考虑后原[1] 。在这里，我刚开数组的最后一个元素，所有的previous记录在运行时都没有了。我没有使用任何其他数据结构或文件。

If possible please tell me how to get the details of 1st element ie. original[0] even after taking the original[1]. Here I am just getting the last element of the array, and all previous records are gone at run time. I am not using any other data structures or files.

我的环境是在Windows上的Turbo C。

My environment is Turbo C on Windows.

推荐答案

您需要阅读有关工会这个问题。你想要的东西更像是：

You need to read this question about unions. You want something more like:

struct family {
    struct name { 
        int gender;
        int married;
        blah
    } names;
    union {
        struct male { blah } male_ancestor;
        struct female_unmarried { blah } female_unmarried_ancestor;
        struct female_married { blah } female_married_ancestor;
    };
}

，那么你可以测试family.names.gender和family.names.married来确定使用哪个成员的工会。

then you can test family.names.gender and family.names.married to determine which member of the union to use.

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