拷贝构造函数String(const String& other) =delete;
赋值void operator=(const String& )=delete;
只要产生新对象其实就是调用了拷贝构造函数
class String {
private:
char *m_Buffer;
unsigned int m_Size;
public:
String(const char *string) {
...
2024.08.11
丑陋的代码
第一天两数之和class Solution {
public:
vector<int> twoSum(vector<int>& nums, int target) {
int i = 0;
int j = 0;
while (1) {
int sum;
if (i==j)
...
2024.08.01
C++单例设计实现class S {
public:
static S &getInstance() {
static S instance;
return instance;
}
private:
S() {}
public:
S(S const &) = delete;
void operator=(S const &) = delete;
};
...
2024.07.30
mutable 关键字允许有const的函数中修改值
class Entiy{
public:
mutable int var;
int val;
void GetVal () const {
var = 3; //Allow,because var is mutable
val=6; //Not Allow
}
};
...
2024.07.30
int* const a = new int; //指针常量
const int* b = new int; //常量指针
先删除类型成为
* const a = new int;
const *b = new int;
然后从=右侧向左侧看,其中*b可以看作先解引用，在被const修饰,所以把*b当作一个值,const valve 即可以看作为值不可变,也就是说第二句中指针指向的值不可变而* const a 中a 没有被解引用,所以看作它是内存地址,又
...
2024.07.30
你好,世界这是第一篇文章I Love You
...
2024.07.30