g++ -std=c++11-o target_name filen_ame.cpp or: g++ -std=c++0x -o target_name filen_ame.cpp
and will not be supportedinfuture releases [-Wauto-storage-class] auto int b; ^~~~ 1 warning generated. 3 .必需要对auto类型的变量进行初始化,C++ 98中不能单独使用auto定义变量。 $ clang++ main.cpp -std=c++98 main.cpp:6:2: warning:'auto'typespecifier is a C++11 extension [-Wc++11-e...
1 .使用C++ 98标准进行编译,会出现警告: $ clang++ main.cpp -std=c++98 main.cpp:6:2: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions] auto b = a; ^ 1 warning generated. $ ./a.out i #输出结果为整数类型 1. 2. 3. 4. 5. 6. 7. 8. 改用C++ 11进行...
如何在Dev-C++中修复auto关键字错误 在C++中,auto关键字指定正在声明的变量类型将自动从其初始化程序中推断出来。对于函数而言,如果它们的返回类型是auto,则将在运行时通过返回类型表达式进行评估。 // C++程序,用于演示DevC++编译器中的auto关键字 #include <bits/st
Few programmers use the auto keyword in declarations because all block-scoped objects not explicitly declared with another storage class are implicitly automatic. Therefore, the following two declarations are equivalent: 复制 // auto_keyword.cpp int main() { auto int i = 0; // Explicitly declar...
C++ keyword:auto C++ C++ language if switch for while continue-break goto-return decltype auto constexpr consteval constinit --nullptr static_cast const_cast dynamic_cast reinterpret_cast explicit static Keywords Usage Automatic storage duration specifier ...
C++ 標準為此關鍵字定義了原始和修訂的意義。 在 Visual Studio 2010 前,auto關鍵字會在自動儲存體類別中宣告變數,也就是具有區域存留期的變數。 從 Visual Studio 2010 開始,auto關鍵字則會宣告一個變數,從類型是其宣告的初始化運算式推算而來。/Zc:auto[-]編譯器選項可控制auto關鍵字的意義。
In expression template helper types—for example, (valarray+valarray).To use the auto keyword, use it instead of a type to declare a variable, and specify an initialization expression. In addition, you can modify the auto keyword by using specifiers and declarators such as const, volatile, po...
The auto keyword from C++98, where it did absolutely nothing, has been repurposed in C++0x for automatic type deduction. When used in a declaration, it says "make the type of this thing the same as the type of whatever initializes it". Behold: C:\Temp>type autocat.cpp ...
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