此代碼實現廣度優先搜索。廣度優先搜索 - 錯誤結果
#define N 9 //nodes
#define MAXNUM 65555
#define FALSE 0
#define TRUE 1
int main() {
int i, j;
int network[N][N]; //Adjacency matrix
int dist[N]; //distances from node u
int u = 0; //choose first node
void bfs(int, int [N][N], int [N]);
for (i = 0; i < N; i++) {
dist[i] = MAXNUM;
for (j = 0; j < N; j++) {
if (i == j) {
network[i][j] = 0;
} else {
network[i][j] = MAXNUM;
network[j][i] = MAXNUM;
}
}
}
network[0][1]=1; network[0][3]=1; network[0][5]=1;
network[1][0]=1; network[1][2]=1; network[1][6]=1;
network[2][1]=1; network[2][3]=1; network[2][7]=1;
network[3][0]=1; network[3][2]=1; network[3][4]=1;
network[4][3]=1; network[4][5]=1; network[4][7]=1;
network[5][0]=1; network[5][4]=1; network[5][6]=1;
network[6][1]=1; network[6][5]=1; network[6][7]=1;
network[7][2]=1; network[7][4]=1; network[7][6]=1;
bfs(u, network, dist);
return 0;
}
void bfs(int u, int network[N][N], int dist[N]) {
int w, v, onScanQ[N], ScanQ[N], Qsize = 0;
int k;
for (v = 0; v < N; v++) {
dist[v] = MAXNUM;
onScanQ[v] = FALSE;
}
dist[u] = 0;
ScanQ[1] = u;
onScanQ[u] = TRUE;
Qsize = 1;
k = 1;
printf("\nBFS has started examining:\n");
do {
v = ScanQ[k];
printf("%d ", v);
for (w = 0; w < N; w++) {
if ((network[v][w] < MAXNUM) && (!onScanQ[w])) {
Qsize++;
ScanQ[Qsize] = w;
onScanQ[w] = TRUE;
dist[w] = dist[v] + 1;
printf("(%d) ", w);
}
k++;
}
} while (k <= Qsize);
printf("\n");}
但是,而不是這些結果:
BFS已經開始研究: 0(1)(3)(5)1(2)(6)3(4)5 2(7 )6 4 7
我從輸出,僅此:
BFS已經開始研究: 0(1)(3)(5)
什麼是缺失?
你是怎麼發現,當你通過代碼在調試器階梯? – 2011-12-24 13:36:29
您能否介紹一下您的內部數據結構,如ScanQ,onScanQ;計數器/索引像v,w;你的輸出格式 - 這是什麼意思「0(1)(3)(5)」? - 主要是你的算法! .. OTOH你有沒有嘗試去調試呢?請分享您的經驗! – 2011-12-24 13:44:30
我是C新手,並未嘗試調試它。我會嘗試。該網絡是[立方體](http://img861.imageshack.us/img861/2667/networkcube.jpg)。我嘗試檢查此網絡是否與此代碼連接。該算法檢查第一個節點(u = 0)。 ScanQ是掃描的節點,onScanQ是下一個掃描節點。輸出給出第一個節點u = 0,句子中沒有句子及其鄰居節點! – John 2011-12-24 13:58:25