#include
#include
#define MAX 10
/*邻接矩阵存储方式
cost[][]:二维数组,存放权值
n:顶点个数
distance[i]:i距离出发点的最短路径
path[i]:最短路径上i前面顶点的编号
s:出发点
*/
void shortestPath(int cost[][8], int n, int distance[], int path[], int s){
//判断出发点有没有邻接点
for(int i=0; i if( cost[s][i] != MAX)
break;
else if(i == (n-1) ){
printf("no adjvex\n");
return;
}
//顶点v是否并入集合S中;
bool isUnion[n];
//初始化
for(int i=0; i distance[i] = MAX;
path[i] = -1;
isUnion[i] = false;
}
//初始化出发点相邻接的顶点距离
for(int i =0; i if(cost[s][i] != MAX){
distance[i] = cost[s][i];
path[i] = s;
}
}
isUnion[s] = true;
distance[s] = 0;
//选择最短路径
int min, t;
for(int i=1; i min = MAX;
for(int j=0; j if(!isUnion[j] && distance[j] < min){
min = distance[j];
t = j;
}
isUnion[t] = true;
//更新t相邻点的值
for(int k=0; k if(cost[t][k] != MAX)
if(!isUnion[k] && distance[k] > distance[t] + cost[t][k]){
distance[k] = distance[t] + cost[t][k];
path[k] = t;
}
}//for
}//for
}//shortestPath()
/** 打印all路径 */
void printPath(int path[],int n, int distance[]){
for(int i=0; i int j = i;
printf("到达顶点 %d 的最短长度和路径分别是:%d \n" , i, distance[i]);
printf("%d", i);
while(path[j] != -1){
printf(" <-- ");
printf("%d", path[j]);
j = path[j];
}
printf("\n");
}
}
/** 测试 */
int main()
{
int s;
int distance[8], path[8];
int w[8][8]={
{10, 1, 10,10, 10, 4, 4, 10},
{10, 10, 9, 10, 10, 2, 10, 10},
{10, 10, 10, 1, 10, 10, 10, 10},
{10, 10, 10, 10, 10, 10, 10, 10},
{10, 10, 2, 5, 10, 10, 10, 10},
{10, 10, 6, 10, 3, 10, 3, 4},
{10, 10, 10, 10, 10, 10, 10, 7},
{10, 10, 10, 3, 1, 10, 10, 10}
};
printf("输入起点: \n");
scanf("%d",&s);
//call1
shortestPath(w, 8, distance, path, s);
//call2
printPath(path, 8,distance);
//display
system("pause");
}
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