广度优先搜索伪代码解读

 void

Unweight( Table T)     /*Assume T is initialized*/

{

int CurrDist; /*当前无权路径长，即边数*/

Vertex V,W;/*V顶点，W顶点（两个变量）*/

for ( CurrDist = 0; CurrDist < NumVertex; CurrDist++)/*无权路径长的最小值是0，最大值是定点数减1*/

{

for each vertex V

if ( !T[V].Known && T[V].Dist ==CurrDIst )/*同时满足V顶点不为已知，起点到V顶点的距离等于当前起点至顶点V的无权路径长*/

{

T[V].Known = True;/*将V顶点放入已知顶点的集合中*/

for each  W adjacent to V /*有向图中邻接点沿着箭头指向方向*/

if ( T[W].Dist == Infinity)

{

T[W].Dist = CurrDist+1;

T[W].Path = V;

}

}

}

最坏的情况：v1------>v2------>v3------>v4------>v5------>v6------>v7------>v8------>v9