sem 2 lab 3 uva 572 floodfill oil deposit

#include<stdio.h>
#include<stdlib.h>
int m,n;
char c[101][101];

void oil(int x,int y)
{
    if(x < 0 || y < 0 || x == m || y == n)
        return;
    if(c[x][y] != '@')
        return;
    if(c[x][y] == '@')
        c[x][y] = '*';
    oil(x,y+1);
    oil(x,y-1);
    oil(x+1,y);
    oil(x-1,y);
    oil(x+1,y+1);
    oil(x+1,y-1);
    oil(x-1,y+1);
    oil(x-1,y-1);
}
int main()
{
    int count;
    x:
    scanf("%d %d",&m,&n);
    {
        if(m == 0)
            return 0;
        for(int i = 0; i < m; i++)
        {
            scanf("%s",&c[i]);
        }
        count = 0;
        for(int i = 0; i < m; i++)
        {
            for(int j = 0; j < n; j++)
            {
                if(c[i][j] != '*')
                {
                    oil(i,j);
                    count++;
                }
            }
        }
        printf("%d \n",count);
    }
    goto x;
    return 0;
}