to_string写好，发现connect函数的bug

homework5/MatrixGraph.h

@@ -5,6 +5,7 @@
 #ifndef MATRIXGRAPH_H
 #define MATRIXGRAPH_H
 
+#include <sstream>
 #include<vector>
 
 #include "GraphExceptions/InsertExistedConnectException.h"
@@ -18,6 +19,10 @@ private:
     struct connection {
         T weight; //权
         bool connected; //是否连接
+        connection() {
+            weight = 0;
+            connected = false;
+        }
     };
 
     vector<T> data; //顶点值
@@ -35,9 +40,9 @@ public:
     // 添加顶点
     void insert(T value) {
         data.push_back(value);
-        matrix.push_back(vector<connection>(0, false)); //添加一行
+        matrix.push_back(vector<connection>()); //添加一行
         for (auto &row: matrix) {
-            row.resize(data.size(), connection(0, false)); // 扩展列
+            row.resize(data.size(), connection()); // 扩展列
         }
     }
 
@@ -66,5 +71,31 @@ public:
             matrix[id2][id1].weight = weight;
         }
     }
+
+    // 打印matrix
+    string to_string() {
+        stringstream ss;
+        for (int i = 0; i < matrix.size(); ++i) {
+            for (int j = 0; j < matrix[i].size(); ++j) {
+                if (j == matrix[i].size() - 1) {
+                    //判断是否哦是最后一个元素
+                    if (isWeighted) {
+                        // 判断是否加权
+                        ss << matrix[i][j].connected << "|" << matrix[i][j].weight;
+                    } else {
+                        ss << matrix[i][j].connected;
+                    }
+                } else {
+                    if (isWeighted) {
+                        ss << matrix[i][j].connected << "|" << matrix[i][j].weight << " ";
+                    } else {
+                        ss << matrix[i][j].connected << " ";
+                    }
+                }
+            }
+            ss << endl;
+        }
+        return ss.str();
+    }
 };
 #endif //MATRIXGRAPH_H