Run time error!

#1

please debug my code . https://ide.codingblocks.com/s/289741

#2

There were many mistakes i have made few changes plz look.

#include <iostream>
#include<bits/stdc++.h>
using namespace std;

class graph{
    public:
    list<int>*l;
    int v;

    graph(int v)
    {
        this->v = v;
        l = new list<int>[v+1];
    }

    void addedge(int x, int y)
    {
    	//cout<<x<<y;
        l[x].push_back(y);
        l[y].push_back(x);
    }
};

void dfs(int* parent , int* children , int curr_node , int* visited , graph g)
{
    visited[curr_node]=1;
    for(auto it : g.l[curr_node])
    {
    	if(!visited[it])
    	{
        	parent[it]=curr_node;
        	children[curr_node] += 1;
        	dfs(parent,children,it,visited,g);
    	}
    }
}

int main() 
{
    int n,m,x,y;
    cin>>n>>m;
    graph g(n);
    for(int k=0;k<m;k++)
    {
    
        cin>>x>>y;
        g.addedge(x,y);
    }

    int parent[n+1],children[n+1];
    int visited[n+1];

    memset(visited,0,sizeof(visited));
    memset(parent,0,sizeof(parent));
    memset(children,0,sizeof(children));

    for(int i=1;i<=n;i++)
    {
        if(!visited[i])
        {
            dfs(parent,children,i,visited,g);
        }
    }

	int ans =0;
    for(int i=1;i<=n;i++)
    {
        int ans =0;
        if(parent[i]!=0 && children[i]>children[parent[i]])
        {
            ans++;
        }
    }
     cout<<ans<<endl;
}
#3

sir can you please comment out errors in my code. I am not able to figure out my mistake.s Moreover you syntax is quite different from what i’ve written in my code.https://ide.codingblocks.com/s/289741

#4

Graph was made till n it had to be made till n+1 and children and parent array had to be initialised to 0 . That’s it . Check the constructor for graph and also the 2 more memsets I added . These 3 changes only