C++实现图的遍历算法(DFS,BFS)的示例代码

typedef struct
{
    //用来存放顶点
    int vexs[MAX];
    //二维数组：用来存放两点之间的关系
    int arcs[MAX][MAX];
    //图的顶点数和边数
    int vexsum, arcsnum;
}AMGraph,*StrAMGraph;

int locate(AMGraph&G, int n)
{
    for (int i = 0; i < G.vexsum; i++)
    {
        if (G.vexs[i] == n)
        {
            return i;
        }
    }
}
 
//创建邻接矩阵
void Creat(AMGraph&G)
{
    int v1 = 0, v2 = 0, w = 0;
    cin >> G.vexsum >> G.arcsnum;
    for (int i = 0; i < G.vexsum; i++)
    {
        cin >> G.vexs[i];
    }
    for (int i = 0; i < G.vexsum; i++)
    {
        for (int j = 0; j < G.vexsum; j++)
        {
            G.arcs[i][j] = 0;
        }
    }
    for (int k = 0; k < G.arcsnum; k++)
    {
        cin >> v1 >> v2 >> w;
        int i = locate(G, v1);
        int j = locate(G, v2);
        G.arcs[i][j] = w;
    }
}

typedef struct Arcnode
{
    int Adjust;
    struct ArcNode *next;
}AcrNode,*StrAcrNode;
 
 
typedef struct
{
    int data;
    StrAcrNode next;
}HeadNode, *StrHeadNode;
 
 
typedef struct 
{
    HeadNode arr[MAX];
    int acsrnum, vexsnum;
}ALGraph, *StrALGraph;

int locate1(ALGraph&G, int n)
{
    for (int i = 0; i < G.vexsnum; i++)
    {
        if (G.arr[i].data == n)
        {
            return i;
        }
    }
}
 
void CreatALGraph(ALGraph&G)
{
    int v1 = 0, v2 = 0, w = 0;
    cin >> G.vexsnum >> G.acsrnum;
    for (int i = 0; i < G.vexsnum; i++)
    {
        cin >> G.arr[i].data;
        G.arr[i].next = NULL;
    }
    for (int k = 0; k < G.acsrnum; k++)
    {
        cin >> v1 >> v2;
        int i = locate1(G, v1);
        int j = locate1(G, v2);
        StrAcrNode p1;
        p1 = new AcrNode;
        p1->next = G.arr[i].next;
    }
}

//对邻接矩阵进行深度优先遍历
void DFS(AMGraph&G, int n)
{
    cout << G.vexs[n] << " ";
    visit[n] = 1;
    for (int i = 0; i < G.vexsum; i++)
    {
        if (G.arcs[n][i] != 1 && visit[i] != 1)
        {
            DFS(G, G.arcs[n][i]);
        }
    }
}

queue<int> qu;
//对邻接矩阵进行广度优先遍历
void BFS(AMGraph&G, int n)
{
    cout << G.vexs[n] << " ";
    qu.push(n);
    while (!qu.empty())
    {
        int m = qu.front();
        qu.pop();
        for (int i = 0; i < G.vexsum; i++)
        {
            if (visit[i] != 1 && G.arcs[m][i] != 1)
            {
                cout << G.vexs[i] << " ";
                visit[i] = 1;
                qu.push(i);
            }
        }
    }
}

void DFS1(ALGraph&G, int n)
{
    cout << G.arr[n].data << " ";
    visit3[n] = 1;
    StrAcrNode p1;
    p1 = G.arr[n].next;
    while (p1)
    {
        int w = p1->Adjust;
        if (visit3[w] != 1)
        {
            DFS1(G, w);
        }
        p1 = p1->next;
    }
}
 
queue<int> qu1;

queue<int> qu1;
void BFS(ALGraph&G, int n)
{
    cout << G.arr[n].data << " ";
    visit4[n] = 1;
    qu1.push(n);
    StrAcrNode p1;
    p1 = G.arr[n].next;
    while (!qu1.empty())
    {
        qu1.pop();
        int w = p1->Adjust;
        while (p1)
        {
            if (visit4[w] != 1)
            {
                qu1.push(w);
                visit4[w] = 1;
            }
            p1 = p1->next;
        }
    }
}

#include<iOStream>
#include<queue>
using namespace std;
const int MAxInt = 10;
int visit[MAxInt];
 
typedef struct
{
    int vexs[MAxInt];
    int arcs[MAxInt][MAxInt];
    int arcnum, vexsnum;
}AMGraph;
 
int locate(AMGraph&G, int n)
{
    for (int i = 0; i < G.vexsnum; i++)
    {
        if (G.vexs[i] == n)
        {
            return i;
        }
    }
}
 
void Creat(AMGraph&G)
{
    int v1 = 0, v2 = 0, w = 0;
    cin >> G.vexsnum >> G.arcnum;
    for (int i = 0; i < G.vexsnum; i++)
    {
        cin >> G.vexs[i];
    }
    for (int i = 0; i < G.vexsnum; i++)
    {
        for (int j = 0; j < G.vexsnum; j++)
        {
            G.arcs[i][j] = MAxInt;
        }
    }
    for (int k = 0; k < G.arcnum; k++)
    {
        cin >> v1 >> v2 >> w;
        int i = locate(G, v1);
        int j = locate(G, v2);
        G.arcs[i][j] = w;
        G.arcs[j][i] = w;
    }
}
 
 
 
queue<int> qu;
void BFS(AMGraph G, int v)
{
    cout << G.vexs[v];
    qu.push(v);
    visit[v] = 1;
    while (!qu.empty())
    {
        int w = qu.front();
        qu.pop();
        for (int i = 0; i < G.vexsnum; i++)
        {
            if (visit[i] != 1 && G.arcs[w][i] != MAxInt)
            {
                cout << G.vexs[i] << " ";
                visit[i] = 1;
                qu.push(i);
            }
        }
    }
}
 
int main()
{
    AMGraph G;
    Creat(G);
    cout << "对图进行广度优先遍历的结果为" << endl;
    BFS(G, 1);
    return 0;
}