C:返回值为指针的函数解读 (三)

typedef struct _STSTAFFINFO
{
char *pName; /* */
int iId; /*ID*/
}stStaffInfo;

/* ù ID */
char* GetStaffNameById(int iId)
{
int i;
int iMaxNameLen = 20;

stStaffInfo stTmpInfo[] =
{
{"Socrates", 1},
{"dyx1024", 2},
{"Kevin", 3},
{"Jim", 4}
};

char *pRetName = (char *)malloc(iMaxNameLen);
if (NULL == pRetName)
{
exit(1);
}

for (i = 0; i < sizeof(stTmpInfo) / sizeof(stTmpInfo[0]); i++)
{
if (stTmpInfo[i].iId == iId)
{
strncpy(pRetName, stTmpInfo[i].pName, iMaxNameLen);
return pRetName;
}
}

strncpy(pRetName, "No match Name", iMaxNameLen);

return pRetName;

}

int main(int argc, char *argv[])
{
int iId = 2;

char *pName = GetStaffNameById(iId);

printf("Staff Name is : %s(id = %d)\n", pName, iId);

free(pName);
pName = NULL;

system("PAUSE");

return 0;
}

摘自 Socrates的专栏