使用友员出现警告的问题?

2008-11-21 04:43:04 139 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

STM32F4驱动海康工业相机实战：从PWM信号到精准触发拍照（附完整代码）本文详细介绍了如何使用STM32F4开发板驱动海康工业相机，实现PWM信号精准触发拍照的完整方案。从硬件连接到PWM信号生成，再到相机触发配置与延迟补偿，提供了实战经验和完整代码，帮助开发者解决工业相机硬件触发中的关键问题。阅读详情

我的代码如下,因为我是想实现图的各种操作,原代码很长,所以只贴了一部分,友元函数已经定义.且没错.
但是编译器会出警告.大家看下是怎么回事?谢谢.



#include<iostream>

using namespace std;



template<typename T,typename E>

class MatrixGraph

{

    T *VerticesList;     //vertex table

    E **Edge;           //Adjacent matrix

    friend istream& operator >>(istream& in,MatrixGraph<T,E>& G);

    friend ostream& operator <<(ostream& out,MatrixGraph<T,E>& G);

public:

    MatrixGraph(int sz=defaultVertices);

    ~MatrixGraph()

    {

        delete [] VerticesList;

        delete [] Edge;

    }

};





template<typename T,typename E>

MatrixGraph<T,E>::MatrixGraph(int sz)

{

    maxVertices = sz;

    numVertices = numEdges = 0;

    VerticesList = new T[maxVertices];    //create array of vertex table

    Edge =  new int *[maxVertices];  //create array of AdjacentMatrix

    for (int i=0;i<maxVertices;i++)

          Edge[i] = new int[maxVertices];

    for (int i=0;i<maxVertices;i++)

          for (int j=0;j<maxVertices;j++)

            Edge[i][j] = (i==j) ? 0 : maxWeight;

}



int main(void)

{

    //MatrixGraph<int,int> AdjMatG(10);

    return 0;

}