stuck in test case

[surfersss]

i would like to know , what is wrong with my code below
i input test case:

2
3 2
1 2
2 3
4 4
1 2
2 3
3 4
4 2

and it stuck in last iteration in scanf. why this hapen?

  #include <iostream>
#include <vector>
#include <stdio.h>
#include <string.h>
#include <queue>
#define SIZE 100000

using namespace std;
typedef pair<int, int> k;
vector<int>v[SIZE];
int dist[SIZE];
int visit[SIZE];
bool vis[SIZE];
int main()
{
	int test, tujuan, edge, awal, akhir;
	scanf("%d", &test);
	while (test) {
		scanf("%d %d", &tujuan, &edge);

		for (int i = 0; i < edge; i++) {
			
			scanf("%d %d\n", &awal, &akhir); /*stuck here in last iteration */
			v[awal].push_back(akhir);
			v[akhir].push_back(awal);

			memset(vis, false, sizeof vis);
			std::fill(dist, dist + edge + 2, 10000000);
		}

		dist[1] = 0;
		priority_queue<k, vector<k>, greater<k> >s;
		s.push(make_pair(0, 1));
		while (!s.empty()) {
			k baru = s.top();
			s.pop();
			int dis = baru.first;
			int node = baru.second;
			if (vis[node])continue;
			vis[node] = true;
			for (int i = 0; i < v[node].size(); i++) {
				int e = v[node][i];
				if (dist[e] > dis + 1) {
					dist[e] = dis + 1;
					s.push(make_pair(dist[e], e));
				}

			}
		}
		cout << dist[tujuan] << "\n";
		test--;
	}



	return 0;
}

[dutch]

Try removing the \n from the scanf format.

But why are you using scanf in C++ anyway?

[salem c]

> scanf("%d %d\n", &awal, &akhir); /*stuck here in last iteration */
Yeah, remove the \n from your format.

Also, why ARE you using scanf in a C++ program?

> memset(vis, false, sizeof vis);
> std::fill(dist, dist + edge + 2, 10000000);
Why are these inside your for loop?