foo.cc: In function 'int bfs()':
foo.cc:23:15: error: 'n' was not declared in this scope
    if(x>=0&&x<n&&y>=0&&y<m&&g[x][y]=='.')
               ^
foo.cc:23:26: error: 'm' was not declared in this scope
    if(x>=0&&x<n&&y>=0&&y<m&&g[x][y]=='.')
                          ^
foo.cc:23:29: error: 'g' was not declared in this scope
    if(x>=0&&x<n&&y>=0&&y<m&&g[x][y]=='.')
                             ^
foo.cc:33:11: error: 'n' was not declared in this scope
  return d[n-1][m-1];
           ^
foo.cc:33:16: error: 'm' was not declared in this scope
  return d[n-1][m-1];
                ^
foo.cc: In function 'int main()':
foo.cc:42:15: error: 'g' was not declared in this scope
   scanf("%c",&g[i][j])
               ^
foo.cc:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~

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