摘要：
REAL programmers don't write specs--users should consider themselves lucky to get any programs at ll and take what they get. 2.real programmer don't ... 阅读全文
摘要：
2) k = 0 1 for (i = 1; i < =n;i++){ 2 for(j = i; j < = n; j++) 3 k ++; } K++得执行次数是n,n-1,n-2,....1的等差数列求和得，(n+1)*n/2 等差数列求和公式：Sn=(a1+an)*n/2 ------... 阅读全文