generate graph with two different ways finished

Author: Zu3zz

graph-theory/01-graph-representation/DenseGraph.h

@@ -0,0 +1,48 @@
+#include <iostream>
+#include <cassert>
+#include <vector>
+
+using namespace std;
+
+class DenseGraph{
+private:
+  int n, m;               // 节点数和边数
+  bool directed;          // 是否为有向图
+  vector<vector<bool> > g; // 图的具体数据
+
+public:
+  // 构造函数
+  DenseGraph(int n, bool directed){
+    assert(n >= 0);
+    this->n = n;
+    this->m = 0;
+    this->directed = directed;
+    for(int i = 0; i < n; i++)
+    {
+      g.push_back(vector<bool>(n, false));
+    }
+  }
+  ~DenseGraph(){}
+
+  int V(){return n;}
+  int E(){return m;}
+
+  void addEdge(int v, int w){
+    assert(v >= 0 && v < n);
+    assert(w >= 0 && w < n);
+    if(hasEdge(v,w)){
+      return;
+    }
+    g[v][w] = true;
+    if(!directed){
+      g[w][v] = true;
+    }
+    m++;
+  }
+  
+  bool hasEdge(int v, int w){
+    assert(v >= 0 && v <n);
+    assert(w >= 0 && w < n);
+    return g[v][w];
+  }
+};

graph-theory/01-graph-representation/SparseGraph.h

@@ -0,0 +1,49 @@
+#include <iostream>
+#include <cassert>
+#include <vector>
+
+using namespace std;
+
+class SparseGraph
+{
+private:
+  int n, m; // 节点数和边数
+  bool directed; // 是否为有向图
+  vector<vector<int> > g; // 图的具体连接情况
+
+public:
+  // 构造函数
+  SparseGraph(int n, int directed){
+    this->n = n;
+    this->m = 0;
+    this->directed = directed;
+    for(int i = 0;i<n;i++){
+      g.push_back(vector<int>());
+    }
+  }
+  ~SparseGraph(){}
+
+  int V(){return n;}
+  int W(){return m;}
+
+  void addEdge(int v, int w){
+    assert(v >= 0 && v < n);
+    assert(w >= 0 && w < n);
+    g[v].push_back(w);
+    // 考虑自环边
+    if( v != w && !directed){
+      g[w].push_back(v);
+    }
+    m++;
+  }
+  // 需要遍历 O(n)
+  bool hasEdge(int v, int w){
+    assert(v >= 0 && v < n);
+    assert(w >= 0 && w < n);
+    for(int i = 0;i<g[v].size();i++){
+      if(g[v][i] == w)
+        return true;
+      return false;
+    }
+  }
+};

graph-theory/01-graph-representation/main.cpp

@@ -0,0 +1,5 @@
+#include <iostream>
+#include <cassert>
+
+using namespace std;
+