static- 靜態存儲期與內部鏈接(除非在塊作用域) extern- 靜態存儲期與外部鏈接(除非已聲明帶內部鏈接) _Thread_local(C23 前)thread_local(C23 起)- 線程存儲期 (C11 起) 解釋 存儲類說明符出現於聲明和複合字面量表達式(C23 起)中。至多可使用一個說明符,但可以將_Thread_local(C23 前)thread_local(C23 ...
static thread_local (C++11 起) extern mutable 声明说明符序列 中只能出现一个存储类说明符,但thread_local可以与static或extern一起出现(C++11 起)。 mutable不会影响存储期。它的用法参考const/volatile。 其他存储类说明符可以在以下声明的声明说明符序列 中出现: ...
main.cpp:11:12: error: ‘i’ was declared ‘extern’ and later ‘static’ [-fpermissive]另外,...
storage class specifiers, which determine the linkage of the identifier (static,extern, or none) function specifiersinline,_Noreturn, or none parameter-list-declarator-a declarator for a function type which uses aparameter listto designate function parameters ...
extern(1) false float for(1) friend goto if(3)(5) inline(1)(3) int(1) long mutable(1) namespace new noexcept(C++11) not not_eq nullptr(C++11) operator(1) or or_eq private(4) protected public reflexpr(reflection TS) register(3) ...
cout << x << endl; x++; } break语句只能跳出本层循环,假如你要跳出一个三重嵌套的循环,你就要使用包含其它的逻辑或者用一个goto语句跳出这个嵌套循环. case 在switch里面用来检测匹配 . default,switch catch catch 语句通常通过throw语句捕获一个异常. ...
extern double foo(int val) {} std::future<double> result = async(foo, 5); //返回值类型 std::future_status status; // 等待一段时间 status = result.wait_for( std::chrono::seconds(1) ); // 等待到某一时间点 status = result.wait_for( std::chrono::now() + std::chrono::seconds...
extern false float for friend goto if inline int long mutable namespace new noexcept not not_eq nullptr operator or or_eq private protected public reflexpr register reinterpret_cast requires return short signed sizeof static static_assert static_cast struct switch synchronized template this thread_loc...
extern false float for friend goto if inline int long mutable namespace new noexcept not not_eq nullptr operator or or_eq private protected public reflexpr register reinterpret_cast requires return short signed sizeof static static_assert static_cast struct switch synchronized template this thread_loc...
extern double foo(int val) {} std::future<double> result = async(foo, 5); //返回值类型 std::future_status status; // 等待一段时间 status = result.wait_for( std::chrono::seconds(1) ); // 等待到某一时间点 status = result.wait_for( std::chrono::now() + std::chrono::seconds...