错误消息:'jj'的名称查找已更改为ISO'for'scoping,(如果使用'-fpermissive',G ++将接受您的代码)

Question

错误是:

In function ‘int returnShortestWeightedBranch(std::vector<route, std::allocator<route> >*)’:
error: name lookup of ‘jj’ changed for ISO ‘for’ scoping
note: (if you use ‘-fpermissive’ G++ will accept your code)

代码是:

for (int i = 0; i< routeVector.size(); i++)
        {
            if (routeVector[i].exitPoint == exitPointDetailsVector[preserveL].exitPoint)
            {
                cout << "\n-----------parent: " << routeVector[i].exitPoint;
                branch obj;
                obj.connectedExitPoint = exitPointDetailsVector[preserveI].exitPoint;
                routeVector[i].selectedBranchesVector.push_back (obj);

                for (int jj = 0; jj < routeVector[i].selectedBranchesVector.size(); jj++);
                {
                    cout << "\n-----------branch: " << routeVector[i].selectedBranchesVector[jj].connectedExitPoint;
                }
            }
        }

这可能是什么问题？

编辑1:

我改变了以下内容:

for (int jj = 0; jj < routeVector[i].selectedBranchesVector.size(); jj++);

至:

int jj;
for (jj = 0; jj < routeVector[i].selectedBranchesVector.size(); jj++);

现在它正在工作!! 我不理解原因.

Answer 1

你在内部for语句的末尾有一个分号.这结束了jj那里的范围,所以它在块内部是不可见的.

编辑
您已解决了范围问题,但仍然只执行了for循环

<nothing>;

括号后删除分号!