C++實現有向圖鄰接表的構建
阿新 • • 發佈:2020-04-27
本文例項為大家分享了C++實現有向圖鄰接表的構建程式碼,供大家參考,具體內容如下
資料結構裡面的一道基礎題,分享下自己的寫法,驗證可跑。
#include<iostream> #include<string> const int MAX = 20; using namespace std; struct ArcNode { //弧結點 int adjvex = -1; //所指頂點位置 ArcNode *nextarc = nullptr; //下一條狐指標 size_t info = 0; //弧資訊 }; struct VNode { //頂點 string data = "0"; ArcNode *firstarc = nullptr; //第一條依附該頂點的弧的指標 }; struct Graph { //圖結構 VNode vertices[MAX]; //全部頂點 int vexnum,arcnum; //頂點數和弧數 Graph(int m,int n) :vexnum(m),arcnum(n) {}; Graph() :vexnum(0),arcnum(0) {}; }; int main() { int vnum,anum,tempanum = 0; cout << "輸入頂點數:"; cin >> vnum; cout << "輸入弧數:"; cin >> anum; cout << "\n\n"; Graph G(vnum,anum); for (int i = 0; i != vnum; ++i) { cout << "輸入結點" << i << "的資訊:"; cin >> G.vertices[i].data; if (tempanum != anum) cout << "輸入依靠此結點的弧的資訊(輸入-1以停止):\n"; else cout << "已輸入所有弧的資訊!\n"; bool first = true; ArcNode *p,*temp; for (int j = 0; (j != anum) && (tempanum != vnum); ++j) { int pointto; cout << "輸入弧" << tempanum << "所指向的頂點位置:"; cin >> pointto; if (pointto == -1) break; else { ++tempanum; if (first == true) { first = false; G.vertices[i].firstarc = new ArcNode; G.vertices[i].firstarc->adjvex = pointto; p = G.vertices[i].firstarc; } else { temp = new ArcNode; temp->adjvex = pointto; p->nextarc = temp; p = temp; } } } cout << endl; } for (int i = 0; i != anum; ++i) { cout << "頂點" << i << ": |" << G.vertices[i].data << "|"; if (G.vertices[i].firstarc) { cout << " -> " << G.vertices[i].firstarc->adjvex; auto pt = G.vertices[i].firstarc->nextarc; while (pt) { cout << " -> " << pt->adjvex; pt = pt->nextarc; } cout << "-> ^"; } else cout << " -> ^"; cout << endl; } return 0; }
由於只是單純構建基本的無權值有向圖鄰接表,裡面的弧結構中弧資訊未利用到。
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。