if (deep == n)
    {
        if (sum == 0)
        {
            found = true;
            for(int i = 1; i <= n; i++)
            {
                printf("%d", i);
                if(i == n) break;
                if(opr[i]) printf("+");
                else printf("-");
            }
            printf("\n");
        }
        return ;
    }
    opr[deep] = true;
    dfs(deep + 1, sum + deep + 1);
    opr[deep] = false;
    dfs(deep + 1, sum - deep - 1);
}

代码是这个样子。。。。是不是if(deep==n)这一步不成立  是执行下面的if(sum==0) 还是执行 opr[deep] = true这一步，求指导。。谢谢


[ 本帖最后由 minf26941745 于 2015-6-21 17:25 编辑 ]