问题在于局部变量 a 位于 func 的栈帧中，当 func 执行结束，其栈帧也不复存在，因此 main 函数中调...
// global.c -- uses an external variable#include<stdio.h>intunits =0;/* an external variable */voidcritic(void);intmain(intargc,charconst*argv[]){externintunits;/* an optional redeclaration */printf("How many pounds to a firkin of butter?\n");scanf("%d", &units);while(units !=5...
具体见:https://stackoverflow.com/questions/19371137/c-reference-to-local-variable-returned 会引发问题的实现如下: 修改find1方法返回对象而不是引用 ...c++ 错误: reference to local variable ‘...’ returned 当返回函数的零时量的引用的时候就会出现这种情况。 3.cc: In function ‘const string& add...
规则8.2(强制): 不论何时声明或定义了一个对象或函数,它的类型都应显式声明。 externx;/* Non-compliant – implicit int type */externint16_tx ;/* Compliant – explicit type */consty ;/* Non-compliant – implicit int type */constint16_ty ;/* Compliant – explicit type */staticfoo(void)...
return std::string("Hello from macOS!"); #else return std::string("Hello from an unknown system!"); #endif } int main() { std::cout << say_hello() << std::endl; return EXIT_SUCCESS; } 如何操作 让我们构建一个对应的CMakeLists.txt实例,这将使我们能够根据目标操作系统有条件地编译源...
CL.ASSIGN.RETURN_CONST 赋值运算符返回常量引用 4 True 2020.1 之前 CL.ASSIGN.VOID 赋值运算符返回虚值 4 True 2020.1 之前 CL.FFM.ASSIGN 使用了释放内存(双重释放)- 无赋值 (=) 运算 3 True 2020.1 之前 CL.FFM.COPY 使用了释放内存(双重释放)- 无复制构造函数 3 True 2020.1 之前 CL.FMM 释放不匹配...
conversion to void * in C and C++ Conversions from DWORD to Char[] Convert _TCHAR* variable to CString Convert a DLL to static Lib convert BYTE to _TCHAR Convert char * to LPCTSTR Convert char* to System::String^ convert const char * to LPTSTR convert cstring to char* Convert CString ...
The most immediate example is that you shouldn't return a reference to local memory: int& getLocalVariable() { int x; return x; } Once the stack frame containing the memory for getLocalVariable is taken off the stack, then the reference returned by this function will no longer be ...
Pointer or procedural variable expected缺指针或过程变量error 143 : Invalid procedure or function reference无效的过程或函数调用error 144 : Cannot overlay this unit 不能覆盖该单元error 146 : File access denied 不允许文件访问error 147 : Object type expected 缺对象类型error 148 : Local object types ar...
Compiler warning C4181qualifier applied to reference type; ignored Compiler warning (level 1) C4182#includenesting level isnest_countdeep; possible infinite recursion Compiler warning (level 1) C4183'identifier': missing return type; assumed to be a member function returning 'int' ...