离散化unique用法

signed main()
{
    int a[11]={1000, 1,8,   1,4,   6,1,   3,2,   9,0};
    sort(a+1,a+1+10);
    int len = unique(a+1, a + 1 + 10) - a -1;
    for(int i=1;i<1 + len;++i) cout<<a[i]<<"  ";
    puts("");
    cout<<len<<endl;
    return 0;
}
/* output:
0  1  2  3  4  6  8  9
8
*/