Dijkstra算法（邻接阵）模板

int maxData=10000000;
int graph[arraysize][arraysize];
int d[arraysize];
int pre[arraysize];             //存储节点前驱
bool final[arraysize];
int t,n;
void Dij(int src)
{
    int i,j;
    int minData;
    int v;
    memset(final,0,sizeof(final));
    for(i=1;i<=n;++i)
    {
        d[i] = graph[src][i];
        if(d[i]<maxData)
            pre[i]=src;
        else
            pre[i]=0;
    }
    final[src]=true;
    d[src]=0;
    for(i=1;i<n;++i)
    {
        minData = maxData;
        for(j=1;j<=n;++j)
        {
            if(!final[j] && d[j]<minData)
            {
                 v = j;
                 minData=d[j];
            }
        }
        final[v]=true;
        for(j=1;j<=n;++j)
        {
            if(!final[j] && graph[v][j]<maxData && d[j]>d[v]+graph[v][j])
            {
                 d[j]=d[v]+graph[v][j];
                 pre[j]=v;             //前驱节点更新
            }
        }
    }
    cout<<d[1]<<endl;                  //输出所需的最短路
}
int main()
{
    freopen("1.txt","r",stdin);
    int i,j;
    int start,end,cost;
    while(cin>>t>>n)
    {
        for(i=1;i<=n;++i)      //此处别忘了进行初始化临界矩阵为无穷大
        {
            for(j=1;j<=n;++j)
            {
                graph[i][j]=maxData;
            }
        }
        for(i=1;i<=t;++i)
        {
            cin>>start>>end>>cost;
            if(cost<graph[start][end])          //重边判断
            {
                 graph[start][end]=cost;
                 graph[end][start]=cost;
            }
        }
        Dij(n);
        //输出最短路径(如果需要从源点到终点输出可利用栈实现)
        int p = 1;    //终点
        while(p!=n)   //源点
        {
            cout<<p<<" ";
            p = pre[p];
        }
        cout<<p<<endl;
    }
    getch();
    return 0;
}

来源：https://www.cnblogs.com/north_dragon/archive/2010/06/03/1751010.html

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dijkstra