Question

除这一未界定的符号错误外,一切都在发挥作用:

bash-3.2$ make
g++ -Wall -g solvePlanningProblem.o Position.o AStarNode.o PRM.o PRMNode.o Worl.o SingleCircleWorld.o Myworld.o RECTANGLE.o CIRCLE.o -o solvePlanningProblem

`Undefined symbols:
  "Obstacle::~Obstacle()", referenced from:
      Myworld::~Myworld()in Myworld.o
      Myworld::~Myworld()in Myworld.o
      Myworld::~Myworld()in Myworld.o
  "RECTANGLE::RECTANGLE()", referenced from:
      Myworld::readObstacles(std::basic_istream<char, std::char_traits<char> >&
in Myworld.o
  "CIRCLE::CIRCLE()", referenced from:
      Myworld::readObstacles(std::basic_istream<char, std::char_traits<char> >&
in Myworld.o
  "typeinfo for Obstacle", referenced from:
      typeinfo for RECTANGLEin RECTANGLE.o
      typeinfo for CIRCLEin CIRCLE.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make: *** [solvePlanningProblem] Error 1`

It s such a strange error. Is something wrong with the constructor or destructor? Any advice will help.

After adding {} after all constructors and destructors the error has been reduced to:

Undefined symbols:

  "vtable for Obstacle", referenced from:
      Obstacle::Obstacle()in Myworld.o
  "typeinfo for Obstacle", referenced from:
      typeinfo for RECTANGLEin RECTANGLE.o
      typeinfo for CIRCLEin CIRCLE.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

Answer 1

联系人可以发现奥斯塔奇班的主子。

它是否属于另一个物体档案(perhaps Obstacle.o)? 如果是的话,在物体清单中添加这一点。

它是否应当成为阶级定义中的空洞虚拟脱轨者? 在此情况下,确保你写书面材料。

virtual ~Obstacle() {}

而不是

virtual ~Obstacle();

第一项措施是执行停火者;第二项声明是存在,但在其他地方执行。

Answer 2

象你这样的人没有执行“主子”栏。这是界定的。

LD是联系人,这意味着所有东西都汇编了罚款,但当它开始把双筒连接在一起时,它就能够找到你法典中使用的“主人”。

增编

~Obstacle() {}

缩略语

Answer 3

或许是你宣布Der,但却没有执行。 1. 将{}列入档案,或:

Obstacle::~Obstacle()
{
}

参看第2页。

Answer 4

它还认为,从RECTANGLE和CIRCLE中遗漏了违约构件。

Answer 5

你没有图书馆。或者有一套破碎的工具链(这取决于电动途径)。

页: 1

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