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优惠券批量生成及导入的思路 - 闲聊区 - 清泛IT论坛,有思想、有深度
... mt_rand(0, PHP_INT_MAX);
$m = base_convert($m, 10, 36); // 主随机
$n = base_convert($n, 10, 36); // 辅随机
$r = substr($m . $n, 0, 16);
} whi...
如何获取IE (控件)的所有链接(包括Frameset, iframe) - 其他 - 清泛IT社...
...LWindow2 -> IID_IWebBrowserApp -> IHTMLWindow2 绕过了限制。
// Converts a IHTMLWindow2 object to a IHTMLDocument2. Returns NULL in case of failure.
// It takes into account accessing the DOM across frames loaded from different domains.
CComQIPtr<IHTMLDocument2> HtmlWindowToHtmlDocu...
nvarchar和varchar相互转换、联合查询 - ORACLE - 清泛IT论坛,有思想、有深度
...要对数据类型进行转换。
Specifying the USING CHAR_CS argument converts text into the database character set. The output datatype is VARCHAR2.
Specifying the USING NCHAR_CS argument converts text into the national character set. The output datatype is NVARCHAR2.
(A表字段c_xxx:varc...
自定义下载器扩展:个性化下载进度展示 - App Inventor 2 拓展 - 清泛IT社...
...et the current download ID.
Cancel all ongoing downloads.
This block converts the bytes into KB and MB automatically, You can use own calculation for converting bytes into big units.
Get the downloaded size for a specific download ID.
These blocks pause/resume/cancel the download for giv...
C语言面试那些事儿──一道指针与数组问题 - c++1y / stl - 清泛IT社区,为创新赋能!
首先看如下代码:
int main(int argc, char** argv)
{
int a[5] = {1,2,3,4,5};
int* ptr = (int*)(&a + 1);
printf("%d,%d\n", *(a+1), *(ptr-1));
return 0;
}复制代码这道题在很多所谓经典C语言面试题里是常见...
如何获取控件的值? - C++ UI - 清泛IT社区,为创新赋能!
最简单直观的:
CString str;
GetDlgItemText(IDC_EDIT_TEST, str);
int d=atoi(str.GetBuffer(0));
更优雅的:
.h:int m_editTest;
.cpp:
void CxxDlg::DoDataExchange(CDataExchange* pDX)
{
DDX_Text(pDX, IDC_EDIT_TEST, m_editTest);
}
这样就绑定了控件和一...
APP INVENTOR硬件交互学习教程07——多个参数上报 - 创客硬件开发 - 清泛IT...
...no代码,温度和电位计使用随机数生成
// 引脚定义
const int ledPin1 = 5;// the number of the LED pin
const int ledPin2 = 6;
const int ledPin3 = 3;
const int bluePin = 6;// the number of the LED pin
const int greenPin = 5;
cons...
APP INVENTOR硬件交互学习教程04——蓝牙控制继电器 - 创客硬件开发 - 清泛...
...序
串口接收字符,并输出控制继电器
// 引脚定义
const int ledPin1 = 5;// the number of the LED pin
const int ledPin2 = 6;
const int ledPin3 = 3;
const int bluePin = 6;// the number of the LED pin
const int greenPin = 5;
cons...
APP INVENTOR硬件交互学习教程06——硬件参数上报 - 创客硬件开发 - 清泛IT...
...收处理和显示判断
3.arduino nano代码
// 引脚定义
const int ledPin1 = 5;// the number of the LED pin
const int ledPin2 = 6;
const int ledPin3 = 3;
const int bluePin = 6;// the number of the LED pin
const int greenPin = 5;
cons...
error C2143:语法错误 : 缺少“;”(在“*”的前面) error C4430:缺少类型...
...1>d:\xxx\childfrm.h(73): error C4430: 缺少类型说明符 - 假定为 int。注意: C++ 不支持默认 int
一般这个错误是没有include头文件导致,
仔细检查下 .h 中是不是定义类成员变量时没有包含相应的头文件。
拓展:
.h中定义类对象成...