如何在结构中动态添加数据,该结构是指针数组的指针

Question

我有两个结构如下:

typdef struct abc
{
   int id;
   char name;
}s_abc,*lpabc;
typdef struct result
{
    int acc_no;
    lpabc *details;
}s_res;

我需要在结构结果中动态添加数据,这些数据指向指针数组,即:struct abc 结构abc可以是例如5个值的数组.我该如何添加值？

定义的结构是明确的:为了更好地理解我附加下面的结构: -

typedef struct _wfs_cdm_physicalcu
{
    LPSTR                 lpPhysicalPositionName;
    CHAR                  cUnitID[5];
    ULONG                 ulInitialCount;
    ULONG                 ulCount;
    ULONG                 ulRejectCount;
    ULONG                 ulMaximum;
    USHORT                usPStatus;
    BOOL                  bHardwareSensor; 
 } WFSCDMPHCU, *LPWFSCDMPHCU;

typedef struct _wfs_cdm_cashunit
{
    USHORT                usNumber;
    USHORT                usType;
    LPSTR                 lpszCashUnitName;
    CHAR                  cUnitID[5];
    CHAR                  cCurrencyID[3];
    BOOL                  bAppLock;
    USHORT                usStatus;
    USHORT                usNumPhysicalCUs;
    LPWFSCDMPHCU         *lppPhysical;

} WFSCDMCASHUNIT, *LPWFSCDMCASHUNIT;
typedef struct _wfs_cdm_cu_info
{
    USHORT                usTellerID;
    USHORT                usCount;
    LPWFSCDMCASHUNIT *lppList;
} WFSCDMCUINFO, *LPWFSCDMCUINFO;

在这里,我需要访问_wfs_cdm_physicalcu 4次的数据,即:一个数组.

Answer 1

在C++中停止使用C语言; 这只会导致混乱.

#include <string>
#include <vector>

struct abc {
    int id;
    std::string name;
};
struct result {
    int acc_no;
    std::vector<abc> details;
};

现在,您可以根据需要轻松地abc向数组添加任意数量的值:

result r {42, {{1, "Mike"}, {2, "Fred"}}};  // inialise with two values
r.details.emplace_back(3, "Mary");         // add a third