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- typedef struct Info
- {
- char name[5];
- char addr[10];
- int age;
- double salary;
- }tInfo, *pInfo;
- //tInfo为结构体Info的别名
-
- struct stTest
- {
- char name[5];
- char addr[10];
- int age;
- double salary;
- };
-
- int _tmain(int argc, _TCHAR* argv[])
- {
- //结构体指针的创建、置空、赋值
- pInfo info = new tInfo();
- memset(info, 0 ,sizeof(tInfo));
- info->age = 10;
- strcpy(info->name, "zhou");
- strcpy(info->addr,"shandong");
- info->salary = 123.123;
-
- //指针的大小为4,结构体的大小采用对齐模式,32位下是4字节对齐
- //下面的计算为:32 = 8+12+4+8
- int a = sizeof(tInfo);//32
- int b = sizeof(Info);//32
- int c = sizeof(pInfo);//4
- int d = sizeof(info);//4
-
- //结构体转为string
- string str;
- str.assign((const char*)info, sizeof(tInfo));
- //把string转为结构体
- pInfo get = new tInfo();
- memcpy(get, str.c_str(), str.size());
-
-
- //结构体对象创建、置空、赋值
- stTest st;
- memset(&st, 0, sizeof(stTest));
- strcpy(st.addr, "shandong");
- st
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