procedure LoadPerfCounter(); var Ret : Integer; begin if Exec(ExpandConstant('{sys}') + '\lodctr.exe', '/m:test.man', ExpandConstant('{app}') ,SW_HIDE, ewWaitUntilTerminated, Ret) then begin then begin MsgBox(# + SysErrorMessage(Ret), mbError, MB_OK)
但是用for循环调用generator时,发现拿不到generator的return语句的返回值.如果想要拿到返回值,必须捕获StopIteration错误,返回值包含在StopIteration的value中: #!/usr/bin/env python # -*- coding: utf-8 -*- def fib(max): n, a, b = 0, 0, 1 while n < max: yield b a, b = b, a + b n = n + 1 return 'done' #
转载原文地址:http://www.cnblogs.com/webary/p/4967868.html 在牛客网看到一道关于abs()函数返回值的题目,见下图,当时还没反应过来,第一反应是:自从我开始学C语言,就知道它是用来求int数的绝对值的,返回值当然是0或者正数啊,一看答案就是A. 后来思来想去,质问自己 难道这道题就这么简单?于是果断先查函数库,得到: #include <stdlib.h> //或math.h int abs( int num ); 发现库函数的返回值形式都写的是in
http://blog.chinaunix.net/uid-23629988-id-3035613.html 今天探讨一个很看似简单的API “read”的返回值问题.read的返回值有哪几个值?每个值又是在什么情况下发生的? 先问一下男人吧:man 2 read RETURN VALUE On success, the number of bytes read is returned (zero indicates end of file), and the file pos
CREATE PROCEDURE [dbo].[GetNameById] @studentid varchar(8), @studentname nvarchar(50) OUTPUT AS BEGIN SELECT @studentname=studentname FROM student WHERE studentid=@studentid if @@Error<>0 RETURN -1 else RETURN 0 END using (SqlConnection conn = new S
CREATE PROCEDURE [dbo].[GetNameById] @studentid varchar(8), @studentname nvarchar(50) OUTPUT AS BEGIN SELECT @studentname=studentname FROM student WHERE studentid=@studentid if @@Error<>0 RETURN -1 else RETURN 0 END using (SqlConnection conn = new S
