Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

func getScanner(fp *os.File) *bufio.Scanner {
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
	return scanner
}

func getNextString(scanner *bufio.Scanner) string {
	scanner.Scan()
	return scanner.Text()
}

func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}

func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}

func getNextUint64(scanner *bufio.Scanner) uint64 {
	i, _ := strconv.ParseUint(getNextString(scanner), 10, 64)
	return i
}

func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}

func main() {
	fp := os.Stdin
	wfp := os.Stdout
	cnt := 0

	if os.Getenv("MASPY") == "ますピ" {
		fp, _ = os.Open(os.Getenv("BEET_THE_HARMONY_OF_PERFECT"))
		cnt = 0
	}
	if os.Getenv("MASPYPY") == "ますピッピ" {
		wfp, _ = os.Create(os.Getenv("NGTKANA_IS_GENIUS10"))
	}

	scanner := getScanner(fp)
	writer := bufio.NewWriter(wfp)
	for solve(scanner, writer) {

	}
	for i := 0; i < cnt; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
	writer.Flush()
}

func solve(scanner *bufio.Scanner, writer *bufio.Writer) bool {
	sol := solver{}
	sol.w = getNextInt(scanner)
	sol.h = getNextInt(scanner)
	if sol.w == 0 && sol.h == 0 {
		return false
	}
	sol.land = makeInts(sol.h, sol.w)
	for y := 0; y < sol.h; y++ {
		for x := 0; x < sol.w; x++ {
			sol.land[y][x] = getNextInt(scanner)
		}
	}
	ans := 0
	for y := 0; y < sol.h; y++ {
		for x := 0; x < sol.w; x++ {
			if sol.land[y][x] == 0 {
				continue
			}
			ans++
			sol.dfs(y, x)
		}
	}
	fmt.Fprintln(writer, ans)
	return true
}

type solver struct {
	w, h int
	land [][]int
}

func (sol *solver) dfs(y, x int) {
	if y < 0 {
		return
	}
	if y >= sol.h {
		return
	}
	if x < 0 {
		return
	}
	if x >= sol.w {
		return
	}
	if sol.land[y][x] == 0 {
		return
	}
	sol.land[y][x] = 0
	dy := [8]int{-1, -1, -1, 0, 0, 1, 1, 1}
	dx := [8]int{-1, 0, 1, -1, 1, -1, 0, 1}
	for i := 0; i < 8; i++ {
		sol.dfs(y+dy[i], x+dx[i])
	}
}
func makeInts(h, w int) [][]int {
	index := make([][]int, h, h)
	data := make([]int, h*w, h*w)
	for i := 0; i < h; i++ {
		index[i] = data[i*w : (i+1)*w]
	}
	return index
}

C++: #include <iostream>
#include <iomanip>
#include <algorithm>
#include <string>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cstring>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>

using namespace std;

typedef vector<int> VI;
typedef vector<vector<int> > VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef pair<int, PII> PIII;
int dy[8] = {-1, -1, -1, 0, 0, 1, 1, 1};
int dx[8] = {-1, 0, 1, -1, 0, -1, 0, 1};

void dfs(VVI &table, int i, int j) {
    table[i][j] = 0;
    for (int loop = 0; loop < 8; loop++) {
        int new_i = i + dy[loop];
        int new_j = j + dx[loop];
        if (table[new_i][new_j] == 1) {
            dfs(table, new_i, new_j);
        }
    }
    return;
}

int main(void) {
    while(true) {
        int w;
        int h;
        cin >> w >> h;
        if (h == 0) {
            break;
        }
        VVI table(h + 2, VI(w + 2, 0));
        for (int i = 1; i <= h; i++) {
            for (int j = 1; j <= w; j++) {
                cin >> table[i][j];
            }
        }
        int number = 0;
        for (int i = 1; i <= h; i++) {
            for (int j = 1; j <= w; j++) {
                if (table[i][j] == 1) {
                    dfs(table, i, j);
                    number++;
                }
            }
        }
        cout << number << endl;
    }
    return 0;
}

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

int dx[] = {-1, 0, 1, -1, 1, -1, 0, 1};
int dy[] = {1, 1, 1, 0, 0, -1, -1, -1};

int c[50][50];
int w, h;

void dfs(int x, int y)
{
  if (x < 0 || y < 0 || w == x || h == y) return;
  if (c[x][y] == 0) return;
  c[x][y] = 0;
  for (int i = 0; i < 8; i++){
    dfs(x + dx[i], y + dy[i]);
  }
}

int main()
{
  while (cin >> w >> h, w){
    for (int i = 0; i < h; i++){
      for (int j = 0; j < w; j++){
        cin >> c[j][i];
      }
    }

    int cnt = 0;
    for (int i = 0; i < h; i++){
      for (int j = 0; j < w; j++){
        if (c[j][i] == 1){
          cnt++;
          dfs(j, i);
        }
      }
    }
    cout << cnt << endl;
  }
}

C++: #include<iostream>
using namespace std;

int w,h;
int m[50][50];

void solve(int x,int y){
	if(m[y][x] == 1){
		m[y][x] = 0;
		for(int i=-1;i<2;i++){
			for(int j=-1;j<2;j++){
				if(i==0&&j==0){
					continue;
				}
				if(y+i >= 0 && y+i < h && x+i >= 0 && x+i <= w){
					solve(x+j,y+i);
				}
			}
		}
	}
}

int main(){
	while(true){
		int count=0;

		cin >> w >> h;
		if(w==0&&h==0){
			break;
		}

		for(int i=0;i<h;i++){
			for(int j=0;j<w;j++){
				cin >> m[i][j];
			}
		}

		for(int i=0;i<h;i++){
			for(int j=0;j<w;j++){
				if(m[i][j] == 1){
					solve(j,i);
					count++;
				}
			}
		}

		cout << count << endl;
	}
}

C++: #include <bits/stdc++.h>
#include <math.h>
#include <vector>
#include <queue>
#include <iomanip>
#include <string>
#include <algorithm>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rep_1 (i,j,n) for(int i=j;i<n;i++)
typedef long long ll;
typedef long l;
const ll l_INF = 1010101010101010;
const int INF = 1010101010;
const int dx[] = {-1,0,1,0,-1,-1,1,1};
const int dy[] = {0,-1,0,1,1,-1,1,-1};
bool seen[100][100];
int w,h;
bool c[100][100];

int main(){
  while(true){
    cin>>w>>h;
    if(w==0) return 0;
    int cnt=0;
    rep(i,h)rep(j,w) seen[j][i]=false;
    rep(i,h)rep(j,w) cin>>c[j][i];
    int num=0;
    /*rep(i,h){
      rep(j,w) cout<<c[j][i];
      cout<<endl;
    }*/
    rep(i,h){
      rep(j,w){
        stack<int> q;
        if(c[j][i]==0||seen[j][i]) continue;
        q.push(i*w+j);
        while(!q.empty()){
          int x=q.top()%w,y=q.top()/w;
          q.pop();
          if(c[x][y]==0||seen[x][y]) continue;
          //cout<<x<<' '<<y<<endl;
          rep(d,8){
            if(y+dy[d]<0||y+dy[d]>=h||x+dx[d]<0||x+dx[d]>=w) continue;
            if(c[x+dx[d]][y+dy[d]]==0||seen[x+dx[d]][y+dy[d]]) continue;
            q.push((x+dx[d])+(y+dy[d])*w);
          }
          seen[x][y]=true;
        }
        num++;
        //cout<<i<<' '<<j<<endl;
      }
    }
    cout<<num<<endl;
  }
}

C++: #include<bits/stdc++.h>
#define rep(i,a,b) for(int i=int(a);i<int(b);++i)
using namespace std;
typedef long long ll;
int INF = (1LL << 30) - 1;
int MOD = 1e9+7;
int H,W;
void dfs(int h,int w,vector<vector<int> > table){
    //cout << h << " " << w << endl;
    table[h][w] = 0;
    int dx[] = {-1,-1,-1,0,0,1,1,1};
    int dy[] = {-1,0,1,-1,1,-1,0,1};
    rep(i,0,8){
        int nx = w + dx[i];
        int ny = h + dy[i];
        if (nx >= W || nx < 0 || ny >= H || ny < 0) continue;
        if(table[ny][nx])dfs(ny,nx,table);
    }
}
main(){
    cin >> H >> W;
    vector< vector<int> > table;
    while(H){
        table = vector< vector<int> > (H,vector<int>(W) );
        rep(i,0,H)rep(j,0,W)cin >> table[i][j];
        int cnt = 0;
        rep(i,0,H)rep(j,0,W){
            if(table[i][j] == 1){
                dfs(i,j,table);
                cnt++;
            }
        }
        cin >> H >> W;
    }
}