算法总结-图的遍历

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DFS

#include<cstdio>
#include<string>
#include<vector>
#include<iostream>
#include<algorithm>
using namespace std;

int INF = 100000;
int n;//顶点数
int G[1000][1000];//图的矩阵表达
int vis[1000] = {0};//标记已访问的数组

void DFS(int u,int depth){
    vis[u] = 1;

    for(int i = 0;i < n;i++){
        if(vis[i] == 0 && G[i][u] != INF){
            DFS(i,depth+1);
        }
    }
}

int main(){
    for(int i = 0;i < n;i++){
        if(vis[i] == 0){
            DFS(i,1);
        }
    }
}

BFS

#include<cstdio>
#include<string>
#include<vector>
#include <queue>
#include<iostream>
#include<algorithm>
using namespace std;

int INF = 100000;
int n;//顶点数
int G[1000][1000];//图的矩阵表达
int vis[1000] = {0};//标记已访问的数组

void BFS(int u){
    queue<int> q;
    q.push(u);
    vis[u] = 1;
    while(!q.empty()){
        int u = q.front();
        q.pop();
        for(int i = 0;i < n;i++){
            if(vis[i] == 0 && G[i][u] != INF){
                q.push(i);
                vis[i] = 1;
            }
        }
    }
}