1基于范围的for循环
c++
double array[5] = {1.1,2.2,3.3,4.4,5.5} for(double x : array) { cout << x << " "; } cout << endl;
2auto数组
c11容许以下代码spa
std::vector<double> scores; auto pv = score.begin();
3c11初始化数组能够省略等号,能够直接所有初始化为0:指针
double array[4] {};//初始化为0.
4右值引用code
double && rref = std::sqrt(36.00); double j = 15.0; double && jref = 2.0*j +18.5; //移动语义(move semantics)
5在c++primer plus 264页orm
struct free_throws { std::string name; int made; int attempts; float percent; } ... const free_throws & clone(free_throws & ft) { free_throws *pt; *pt = ft; return *pt; }
free_throws & jolly = clone(three);
个人理解是返回了一个free_throws类型的一个const引用(对么?)这个引用指向(指针说指向,引用应该怎么表述?)的空间和& ft指向的空间不是同一个.three
要记得delete回收空间,(new被隐式)ci