• C++实现有向权图的基本操作,界面友好,操作方便,运行流畅


    Ⅰ.功能: 
    
              1.创建图 
              2.展示全图 
              3.添加顶点 
              4.添加边 
              5.删除顶点 
              6.删除边 
              7.查看指定边权值 
              8.修改指定边权值 
              9.输出两点间的所有简单路及路径对应权值 
              10.销毁图 
               ps:关于9,如果不存在任何简单路,输出“不存在任何简单路”。简单路:不含重复顶点的路。如 
                   1 2 3 4 5是简单路,1 2 3 1 4  5不是简单路。可以想见,对于大多数问题,非简单路是没有 
                  研究意义的。如从北京到上海的路线,多次经过同一地点的路线是没有研究价值的。 
     Ⅱ.不足: 
                1.代码冗长,复用率低。原因是有些操作基本相同但又有细微不同(如goto mark6;goto   
                   mark7;),难以封装成一个函数。在此请求大神给出好的解决办法。 
                2.类的成员函数的实现也写在了头文件中,使头文件过长。原因是前几次代码使用了模板,(看  
                  过在下前几篇博文的读者应该知道)而用模板的话,就要求要么将类的成员函数的实现和类放 
                  在一起,要么放在main函数中(尽管听有人说《C++Primer》中说不这样也行,但在下实测的 
    
                  结果是——必须这样)。在下写习惯了,写完后才发现对于此次代码,将类的成员函数的实现 
                  另放一个文件好。但代码已经写完,就暂时不改了,万一再改出bug来,没准又得调半天,这里 
                  和大家说一声,求原谅。 
                3.使用了goto语句(前几次也一样),有人对goto严格禁止,但依在下愚见,小范围内使用还是 
                   可以的,再说,在下也是迫不得已,实在没有更好的办法了。还是那句话,求大神指教。 
                4.时空复杂性较高,特别是时间复杂性,懂这方面的读者一看在下的代码便知。主要是顶点和边 
                  都是用链表实现的,动不动就要遍历,但话说回来,至今在下还没找到比用链表实现更好的方 
                  法,还请高人指教。 
     Ⅲ.优点: 
                 1.程序在多处用了控制,保证了程序的健壮性和友好,可重复操作,体验良好。 
                 2.仅提供Operate()函数一个接口,较大限度地实现了封装。 
     Ⅳ.博主推荐 
                1.找两点间所有简单路并输出路径总权值有一定思维量和技巧性,有兴趣的读者可自行分析相 
                  关代码,体会其思想。此代码为本人原创(当然不排除读者在其它地方见到相似代码,尽管在 
                  下未参考任何书籍或网络资源)。 
     Ⅴ.代码: 
    //.h文件 
    #ifndef GRAPH_H
     #define GRAPH_H
    #include<iostream> #include<iomanip> using namespace std; struct Edge //边结构体 { int egnum; //结点编号 int weight; //权值 Edge* enext; //下一边结点 Edge(int enm, int wgt, Edge* enxt); }; Edge::Edge(int enm, int wgt, Edge* enxt) //边结构体构造函数 { egnum = enm; weight = wgt; enext = enxt; } struct Vertices //顶点结构体 { int number; //结点编号 Edge* state; //顶点状态,用于标记顶点是否被遍历 Edge* eghead; //边链表头结点 Vertices* vnext; //下一顶点结点 Vertices(int num,Edge* sta, Edge* eghed, Vertices* vnxt); }; Vertices::Vertices(int num,Edge* sta,Edge* eghed, struct Vertices* vnxt) //顶点结构体构造函数 { number = num; state = sta; eghead = eghed; vnext = vnxt; } class Graph //图类 { private: int vsize; //记录顶点个数 int esize; //记录边个数 Vertices* vhead; //顶点链表头指针 Vertices* vtail; //顶点链表尾指针 public: Graph(); ~Graph(); void Operate(); //封装操作 private: Vertices* Revads(const int num); //返回某顶点地址,同时用于检测某顶点是否存在 int Creat(); //创建图 Edge* IfEdge(const int vfrom, const int vto); //查看两顶点间是否存在边 bool Addvt(); //添加顶点 int Addeg(); //添加边 void ShowAll(); //展示全图 int Getweit(const int vfrom, const int vto); //查看指定边权值 bool FinRoad(const int vfrom, const int vto); //查找两点间所有简单路 void Destory(); //销毁图 }; Graph::Graph() //图类构造函数 { vsize = 0; esize = 0; vhead = NULL; vtail = NULL; } Graph::~Graph() //图类析构函数 { Destory(); } Vertices* Graph::Revads(const int num) //返回某顶点地址,同时用于检测某顶点是否存在 { Vertices* pt = vhead; bool flag = false; while (pt) { if (pt->number == num){ flag = true; break; } pt = pt->vnext; } if (flag)return pt; else return NULL; } Edge* Graph::IfEdge(const int vfrom, const int vto) //查看两顶点间是否存在边 { Vertices* pt = Revads(vfrom); Edge* pte = pt->eghead; while (pte) { if (pte->egnum == vto) { return pte; } pte = pte->enext; } return NULL; } bool Graph::Addvt() //添加顶点 { cout << "请您输入要添加顶点的个数,程序将自动从当前图中顶点的最大编号往下顺次为新添加顶点编号:" << endl; int sum; cin >> sum; int itnum = vtail->number + 1; int begin = itnum; for (int i = 0; i < sum;i++) { vtail->vnext = new Vertices(itnum, NULL, NULL, NULL); if (!vtail->vnext){ cout << "申请空间失败!" << endl; return false; } vtail = vtail->vnext; itnum++; vsize++; } cout << "顶点添加成功!" << endl; cout << "新顶点编号从" << begin << "" << itnum-1 << ",目前图中共有顶点" << vsize << "个。" << endl; cout << "当前新顶点为孤立顶点,建议您通过选项4添加指向新顶点的边和由新顶点发出的边。" << endl; return true; } int Graph::Addeg() //添加边 { cout << "提示:" << endl; cout << "输入时,请您依次输入边的起点编号、终点编号和边的权值,中间以空格相隔,例如:1 2 20。并且,请您务必输入正整数,"; cout << "如果您未按规定输入,由此造成的一切后果,将由您个人承担,程序开发者概不负责!" << endl; bool sign = true, flag = true; int from, to, weit, choice, abandon,abandon1,abandon2; //标签 Vertices* pt=NULL; while (sign) { while (flag) { abandon = 0; abandon1 = 0; abandon2 = 0; //只要重新输入,就要进行一次初始化 cout << "请您依次输入边的起点、终点和权值:" << endl; cin>> from >> to >> weit; if (from == to) //如果起、止点相同,不进行进一步检查,直接进行选择 { cout << "起点编号与终点编号不得相同!重新输入请按1,放弃本次输入请按0:" << endl; cin >> choice; if (choice == 0){ abandon1 = 1; abandon = 1; } else { abandon1 = 1; flag = false; } } if (!abandon1) //如果起、止点不同,检查起、止点是否正确及两点间是否有边 { pt = Revads(from); if (!pt) //如果起点不存在,不进行进一步检查,直接进行选择 { cout << "您输入的起点不存在!重新输入请按1,放弃本次输入请按0:" << endl; cin >> choice; if (choice == 0){ abandon2 = 1; abandon = 1; } else { abandon2 = 1; flag = false; } } else //如果起点存在,检查终点,若果终点不存在,不进行进一步检查,直接进行选择 { if (!Revads(to)) { cout << "您输入的终点不存在!重新输入请按1,放弃本次输入请按0:" << endl; cin >> choice; if (choice == 0){ abandon2 = 1; abandon = 1; } else { abandon2 = 1; flag = false; } } } if (!abandon2)//如果两点输入正确且都存在,检查两点间是否有边,若无,进行选择 { Edge* ifedge = IfEdge(from, to); if (ifedge) { cout << "从顶点" << from << "到顶点" << to << "的边已经存在,本程序部允许重复添加!重新输入请按1,放弃本次输入请按0:" << endl; cin >> choice; if (choice == 0)abandon = 1; else flag = false; } } } if (flag)flag = false; else flag = true; } //控制输入正确的起点和终点 //插入边 if (!abandon) //如果起点和终点输入正确,开始插入边 { Edge* pte = new Edge(to, weit, NULL); if (!pte){ cout << "申请空间失败!" << endl; goto marka; } if (!pt->eghead) { pt->eghead = pte; } else { Edge* pter = pt->eghead; while (pter->enext) pter = pter->enext; pter->enext = pte; } esize++; cout << "添加成功!目前图中有边" <<esize<< "条。" << endl; } cout << "是否继续添加边?是请按1,否则请按0:" << endl; cin >> choice; if (choice == 1)flag = true; else sign = false; } cout << "边添加完毕!目前图中共有边" <<esize<< "条。"<<endl; marka: return 0; } int Graph::Creat() //创建图 { bool sign = false, flag = true; int choice1; cout << "请您输入欲创建图的顶点的个数,程序将为您创建顶点并为顶点从1开始顺序编号:" << endl; cout << "(注意:请您务必输入正整数,否则后果自负!)" << endl; int numofv; cin >> numofv; int i; for (i = 1; i <= numofv;i++) { if (!vhead) { vhead = vtail = new Vertices(i, NULL,NULL, NULL); if (!vhead){ cout << "申请空间失败!" << endl; goto markc;} } else { vtail->vnext = new Vertices(i,NULL, NULL, NULL); if (!vtail->vnext){ cout << "申请空间失败!" << endl; goto markc; } vtail = vtail->vnext; } } vsize = i - 1; cout << "顶点创建成功!编号从1到" <<vsize<<""<< endl; cout << "是否添加边?是请按1,否则请按0:" << endl; cin >> choice1; if (choice1 == 1)Addeg(); if (choice1 == 0)cout << "图创建成功,但图中无边!" << endl; else cout << "图创建成功!" << endl; markc: return 0; } void Graph::ShowAll() //展示全图 { cout << "<>内为顶点编号,[]内为权值:" << endl; cout << "顶点 " << "相邻顶点及边的权值" << endl; Vertices* pt = vhead; while (pt) { cout << setiosflags(ios::left); cout << "<"<<setw(2)<<pt->number <<">"<< " "; Edge* pte = pt->eghead; while (pte) { cout << "<" << setw(2)<<pte->egnum << ">" << "[" <<setw(3)<< pte->weight << "]" << " "; pte = pte->enext; } cout << endl; pt = pt->vnext; } } int Graph::Getweit(const int vfrom, const int vto) //查看指定边权值 { Vertices* pt = Revads(vfrom); Edge* pte = pt->eghead; while (pte) { if (pte->egnum == vto) return pte->weight; pte = pte->enext; } return 0; } bool Graph::FinRoad(const int vfrom, const int vto) //查找两点间所有简单路 { bool road = false, right, repeat, goon1, goon2; Vertices* pt = NULL; Edge* pte = NULL; int* array = new int[vsize]; array[0] = vfrom; int top = 0; while (top>=0) { right = false; repeat = false; goon1 = true; goon2 = true; pt = Revads(array[top]); pte = pt->state; if (!pte) { pt->state = pt->eghead; top--; goon1 = false; } if (goon1) { while (!right&&pte) { int item = pte->egnum; for (int i = 0; i <= top;i++) { if (array[i] == item) { repeat = true; break; } } if (repeat) { repeat = false; pte = pte->enext; } else right = true; }//内层while结束 if (!pte) { pt->state = pt->eghead; top--; goon2 = false; } if (goon2) { array[++top] = pte->egnum; pt->state = pte->enext; if (pte->egnum == vto) { road = true; int sum = 0; for (int i = 0, j = 1; j <= top;i++,j++) { sum = sum + Getweit(array[i], array[j]); } for (int i = 0; i <= top; i++) { cout << array[i] << " "; } cout << "权值:" << sum; cout << endl; top--; } }//goon2结束 }//goon1结束 }//外层while结束 delete[]array; return road; } void Graph::Destory() //销毁图 { while (vhead) { Edge* pte = vhead->eghead; while (pte) { Edge* iteme = pte; pte = pte->enext; delete iteme; } Vertices* itemv = vhead; vhead = vhead->vnext; delete itemv; } vhead = NULL; vtail = NULL; vsize = 0; esize = 0; } void Graph::Operate() //封装操作 { bool flager = true; while (flager) { cout << "请您选择操作(输入操作前的数字进行选择):" << endl; cout << "1.创建图" << endl; cout << "2.展示全图" << endl; cout << "3.添加顶点" << endl; cout << "4.添加边" << endl; cout << "5.删除顶点" << endl; cout << "6.删除边" << endl; cout << "7.查看指定边权值" << endl; cout << "8.修改指定边权值" << endl; cout << "9.查找两点间所有简单路" << endl; cout << "10.销毁图" << endl; int chonum; //choice number cin >> chonum; switch (chonum) { //创建图 case 1: { if (vhead){ cout << "图已经创建,无需再建!若想新建,请您先销毁旧图!" << endl; break; } Creat(); break; } //展示全图 case 2: { if (!vhead){ cout << "图还未创建或已被销毁!无法执行展示全图操作!" << endl; break; } ShowAll(); break; } //添加顶点 case 3: { if (!vhead){ cout << "图还未创建或已被销毁!无法在此处执行添加顶点操作!您可通过选项1来添加顶点。" << endl; break; } Addvt(); break; } //添加边 case 4: { if (!vhead){ cout << "图还未创建或已被销毁!无法执行添加边操作!" << endl; break; } Addeg(); break; } //删除顶点 case 5: { if (!vhead){ cout << "图还未创建或已被销毁!无法执行删除顶点操作!" << endl; break; } int choice5,ver; Vertices* pt = NULL; cout << "警告:" << endl; cout << "删除顶点操作存在风险!本程序在删除顶点的同时,将自动删除与该顶点直接相连的所有边(包括指向该顶点的和由该顶点发出的),"; cout << "因此,删除顶点操作可能产生较为严重的后果(如使连通的图一分为二或产生孤立点等)。请您慎重考虑!"; cout << "为安全起见,本操作一次只允许删除一个顶点,若您想删除多个顶点,可重复执行本操作。" << endl; cout << "您确定要删除顶点吗?确定请按1,取消请按0:" << endl; cin >> choice5; if (choice5 == 0)break; cout << "提示:" << endl; cout << "输入顶点编号时,请您务必输入正整数,如果您未按规定输入,由此造成的一切后果,将全部由您个人承担,程序开发者概不负责!" << endl; bool sign5 = true; while (sign5) //控制输入正确的顶点编号 { cout << "请您输入顶点编号:" << endl; cin >> ver; pt = Revads(ver); if (!pt) { cout << "您输入的顶点在当前图中不存在!重新输入请按1,退出删除顶点操作请按0:" << endl; cin >> choice5; if (choice5 == 0)goto mark5; else sign5 = false; } if (sign5)sign5 = false; else sign5 = true; }//while(sign5)结束 //删除 //将欲删除顶点及其边单拿出来 if (pt == vhead) vhead = vhead->vnext; else { Vertices* ptv = vhead; while (ptv) //找到pt的前驱 { if (ptv->vnext == pt) break; ptv = ptv->vnext; } ptv->vnext = pt->vnext; } //删除顶点指向的边 Edge* pte = pt->eghead; while (pte) { Edge* iteme = pte; pte = pte->enext; delete iteme; esize--; } //删除顶点 delete pt; vsize--; //删除指向该顶点的边 Vertices* ptrv = vhead; while (ptrv) { int item = ptrv->number; Edge* ptre = IfEdge(item, ver); if (ptre) { if (ptre==ptrv->eghead) { ptrv->eghead = ptre->enext; delete ptre; esize--; } else { Edge* pre = ptrv->eghead; while (pre) { if (pre->enext == ptre) break; pre = pre->enext; } pre->enext = ptre->enext; delete ptre; esize--; } } ptrv = ptrv->vnext; }//while(ptrv)结束 cout << "删除成功!目前图中共有顶点" << vsize << "个,边" << esize << "条。" << endl; mark5: break; } //删除边 case 6: { if (!vhead){ cout << "图还未创建或已被销毁!无法执行删除边操作!" << endl; break; } int choice6,from,to; Vertices* pt=NULL; Edge* ifedge=NULL; cout << "警告:" << endl; cout << "删除边操作存在风险!(如使连通的图一分为二或产生孤立点等)请您慎重考虑!为安全起见,本操作一次只允许删除一条边,"; cout << "若您想删除多条边,可重复执行本操作。" << endl; cout << "您确定要删除边吗?确定请按1,取消请按0:" << endl; cin >> choice6; if (choice6 == 0)break; cout << "提示:" << endl; cout << "输入时,请您依次输入起点编号和终点编号,务必输入正整数,并以空格相隔,例如:1 2。如果您未按规定输入,"; cout << "由此造成的一切后果,将全部由您个人承担,程序开发者概不负责!" << endl; bool flag6=true,control6,control61; while (flag6) { control6 = true; control61 = true; cout << "请您依次输入边的起点编号和终点编号:" << endl; cin >> from >> to; if (from == to) { cout << "起点编号与终点编号不得相同!重新输入请按1,退出删除操作请按0:" << endl; cin >> choice6; if (choice6 == 0)goto mark6; else { control6 = false; flag6 = false; } } if (control6) { pt = Revads(from); if (!pt) { cout << "您输入的起点不存在!重新输入请按1,退出删除操作请按0:" << endl; cin >> choice6; if (choice6 == 0)goto mark6; else { control61 = false; flag6 = false; } } else { if (!Revads(to)) { cout << "您输入的终点不存在!重新输入请按1,退出删除操作请按0:" << endl; cin >> choice6; if (choice6 == 0)goto mark6; else { control61 = false; flag6 = false; } } } if (control61) { ifedge = IfEdge(from, to); if (!ifedge) { cout << "不存在从顶点" << from << "到顶点" << to << "的边,无法执行删除操作!重新输入请按1,退出删除操作请按0:" << endl; cin >> choice6; if (choice6 == 0)goto mark6; else flag6 = false; } } } if (flag6)flag6 = false; else flag6 = true; } //控制输入正确的起点和终点 //删除 if (ifedge==pt->eghead) { Edge* item = ifedge; ifedge = ifedge->enext; pt->eghead = ifedge; delete item; } else { Edge* pter = pt->eghead; while (pter) { if (pter->enext = ifedge) break; } pter->enext = ifedge->enext; delete ifedge; } esize--; //边数减1 cout << "从顶点" << from << "到顶点" << to << "的边已成功删除!目前图中共有边" <<esize<<"条。"<< endl; mark6: break; } //查看指定边权值 case 7: { if (!vhead){ cout << "图还未创建或已被销毁!无法执行查询操作!" << endl; break; } cout << "提示:" << endl; cout << "输入时,请您依次输入起点编号和终点编号,务必输入正整数,并以空格相隔,例如:1 2。如果您未按规定输入,"; cout << "由此造成的一切后果,将全部由您个人承担,程序开发者概不负责!" << endl; bool control = true,sign7=true,flag7,flag71; int vf, vt, choice7; Vertices* ptv = NULL; Edge* ifedge = NULL; while (sign7) { while (control) //控制输入正确的起点编号和终点编号 { flag7 = true; flag71 = true; cout << "请您依次输入起点编号和终点编号:" << endl; cin >> vf >> vt; if (vf == vt) { cout << "起点编号与终点编号不得相同!重新输入请按1,退出查找操作请按0:" << endl; cin >> choice7; if (choice7 == 0)goto mark7; else { flag7 = false; control = false; } } if (flag7) { ptv = Revads(vf); if (!ptv) { cout << "您输入的起点编号在当前图中不存在!重新输入请按1,退出查找操作请按0:" << endl; cin >> choice7; if (choice7 == 0)goto mark7; else { flag71 = false; control = false; } } else { if (!Revads(vt)) { cout << "您输入的终点编号在当前图中不存在!重新输入请按1,退出查找操作请按0:" << endl; cin >> choice7; if (choice7 == 0)goto mark7; else { flag71 = false; control = false; } } } if (flag71) { ifedge = IfEdge(vf, vt); if (!ifedge) { cout << "不存在从顶点" << vf << "到顶点" << vt << "的边,无法执行查找操作!重新输入请按1,退出删除操作请按0:" << endl; cin >> choice7; if (choice7 == 0)goto mark7; else control = false; } } } if (control)control = false; else control = true; }//while循环结束 int itemw = ifedge->weight; cout << "从顶点" << vf << "到顶点" << vt << "的边的权值为" << itemw << endl; cout << "是否继续查询?是请按1,否则请按0:" << endl; cin >> choice7; if (choice7 == 0)sign7 = false; else control = true; } mark7: break; } //修改指定边权值 case 8: { if (!vhead){ cout << "图还未创建或已被销毁!无法执行修改操作!" << endl; break; } cout << "提示:" << endl; cout << "输入时,请您依次输入要修改权值的边的起点编号和终点编号,务必输入正整数,并以空格相隔,例如:1 2。如果您未按规定输入,"; cout << "由此造成的一切后果,将全部由您个人承担,程序开发者概不负责!" << endl; bool control = true, sign8 = true,flag8,flag81; int vf, vt, choice8; Vertices* ptv = NULL; Edge* ifedge = NULL; while (sign8) { while (control) //控制输入正确的起点编号和终点编号 { flag8 = true; flag81 = true; cout << "请您依次输入起点编号和终点编号:" << endl; cin >> vf >> vt; if (vf == vt) { cout << "起点编号与终点编号不得相同!重新输入请按1,退出查找操作请按0:" << endl; cin >> choice8; if (choice8 == 0)goto mark8; else { flag8 = false; control = false; } } if (flag8) { ptv = Revads(vf); if (!ptv) { cout << "您输入的起点编号在当前图中不存在!重新输入请按1,退出查找操作请按0:" << endl; cin >> choice8; if (choice8 == 0)goto mark8; else { flag81 = false; control = false; } } else { if (!Revads(vt)) { cout << "您输入的终点编号在当前图中不存在!重新输入请按1,退出查找操作请按0:" << endl; cin >> choice8; if (choice8 == 0)goto mark8; else { flag81 = false; control = false; } } } if (flag81) { ifedge = IfEdge(vf, vt); if (!ifedge) { cout << "不存在从顶点" << vf << "到顶点" << vt << "的边,无法执行查找操作!重新输入请按1,退出删除操作请按0:" << endl; cin >> choice8; if (choice8 == 0)goto mark8; else control = false; } } } if (control)control = false; else control = true; }//while循环结束 cout << "请您输入新权值(务必输入正整数,否则后果自负!):" << endl; int oldwt,newwt; cin >> newwt; oldwt = ifedge->weight; ifedge->weight = newwt; cout << "修改成功!" << endl; cout << "该边权值从" << oldwt << "修改为" << newwt << "" << endl; cout << "是否继续修改?是请按1,否则请按0:" << endl; cin >> choice8; if (choice8 == 0)sign8 = false; else control = true; } mark8: break; } //查找两点间所有简单路 case 9: { cout << "提示:" << endl; cout << "输入时,请您依次输入起点编号和终点编号,务必输入正整数,并以空格相隔,例如:1 2。如果您未按规定输入," ; cout << "由此造成的一切后果,将全部由您个人承担,程序开发者概不负责!" << endl; bool control=true,flag9; int vf, vt,choice9; Vertices* ptv = NULL; while (control) //控制输入正确的起点编号和终点编号 { flag9 = true; cout << "请您依次输入起点编号和终点编号:" << endl; cin >> vf >> vt; if (vf == vt) { cout << "起点编号与终点编号不得相同!重新输入请按1,退出查找操作请按0:" << endl; cin >> choice9; if (choice9 == 0)goto mark9; else { flag9 = false; control = false; } } if (flag9) { ptv = Revads(vf); if (!ptv) { cout << "您输入的起点编号在当前图中不存在!重新输入请按1,退出查找操作请按0:" << endl; cin >> choice9; if (choice9 == 0)goto mark9; else control = false; } else { if (!Revads(vt)) { cout << "您输入的终点编号在当前图中不存在!重新输入请按1,退出查找操作请按0:" << endl; cin >> choice9; if (choice9 == 0)goto mark9; else control = false; } } } if (control)control = false; else control = true; }//while循环结束 //顶点状态初始化 Vertices* ptr = vhead; while (ptr) { ptr->state = ptr->eghead; ptr = ptr->vnext; }//初始化完成 bool ifroad = FinRoad(vf, vt); //执行查找函数 if (ifroad) { cout << "以上为从" << vf << "" << vt << "的所有简单路及路径对应权值!" << endl; } else cout << "不存在从" <<vf<<""<<vt<<"的任何简单路!"<< endl; //状态还原 Vertices* ptrv = vhead; while (ptrv) { ptrv->state = NULL; ptrv = ptrv->vnext; }//还原完成 mark9: break; } //销毁图 case 10: { if (!vhead){ cout << "图还未创建或已被销毁!不能再销毁!" << endl; break; } cout << "您确定销毁该图吗?确定请按1,取消请按0:" << endl; int choice10; cin >> choice10; if (choice10 == 1) Destory(); cout << "图已销毁!" << endl; break; } //处理用户错误输入 default: { cout << "您的输入有误,无法进行操作!" << endl; break; } }//switch结束 //循环控制 cout << "是否继续?继续请按1,退出请按0:" << endl; int ifgoon; cin >> ifgoon; if (ifgoon == 0)flager = false; }//while结束 } #endif //.cpp文件 #include<iostream> #include"graph.h" using namespace std; int main() { //是否进入程序 int uscho; bool flag = true;//uscho:user choice的缩写 cout << "敬告;请您务必按提示要求操作,如果您进行了规定以外的操作,由此造成的一切后果,将全部由您个人承担,程序开发者概不负责!" << endl; cout << "是否进入程序?进入请按1,否则按0;" << endl; cin >> uscho; if (uscho == 0) return 0; Graph graph; graph.Operate(); return 0; } Ⅵ.结语 代码已经过测试,在VS2013上成功运行! 发此文有两大目的: 1.和大家交流经验,供需要的人参考。 2.在下菜鸟,代码中难免有不妥之处,恳求大神批评指正。您的批评就是在下提高 的起点,对于您的批评,在下将不胜感激!
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  • 原文地址:https://www.cnblogs.com/zpcdbky/p/4108525.html
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