简易通讯录c语言版

* 用改进的欧拉方法求解初值问题，其中一阶微分方程未y =f(x,y) * 初始条件为x=x[0]时,y＝y[0]. * 输入: f--函数f(x,y)的指针 * x--自变量离散值数组(其中x[0]为初始条件) * y--对应于自变量离散值的函数值数组(其中y[0]为初始条件) * h--计算步长 * n--步数 * 输出: x为说求解的自变量离散值数组 * y为所求解对应于自变量离散值的函数值数组 -* Improved Euler method to solve initial value problems, not an order differential equation y = f (x, y)* initial conditions for x = x [0], y = y [0].* Input : f-- function f (x, y)* x pointer-- from the array variable discrete values (x [0] for the initial conditions)* y-- corresponding to the variable discrete value of the function of the array (y [0] for the initial conditions)* h-- calculated step* n-- steps* output : Solving for x that the variable array* discrete values by solving y variables corresponding to the value of the discrete function arrays

源代码是中点Bresenham椭圆法。可以为初学者提供参考。-source code is the midpoint of Bresenham oval law. For beginners can provide a reference.

对决策树的ppt文章，希望对大家有帮住，希望大家喜欢-right decision tree ppt article, and I hope to help you live, hope you like

关于WIndows下PE格式的加密研究 由本程序加密生成的可执行文件可以防止非法使用者对原程序的非法执行、修改、静态分析和拷贝。-PE format encryption study by the encryption process generated executable files to prevent illegal users of the original implementation of the illegal procedures, modification, static analysis and copying.

说明： 7.0的版本但和7.5差不多-Description: version 7.0 and 7.5 but almost

我写的一个大字体字库访问程序，类似于shxvier，显示方面简单一些主要面向字库的应用，字库索引按照区位码顺序做了调整，有兴趣的看看吧.^_^-I wrote a large font library visit procedures, similar to shxvier. a simple display of some of the major application-oriented font, font Index location code with the order made adjustments interested let"s see it. ^ _ ^

有些东西很烂

假设你需要指定范围内的随机数，传统的方法是使用ANSI C的函数random(),然后格式化结果以便结果是落在指定的范围内。但是，使用这个方法至少有两个缺点-suppose you need, within specified limits, random number, the traditional method is to use ANSI C function random (), then formatted results to the results fell within the scope specified. However, the use of this method at least two shortcomings

字库生成器,可以自动生成任意大小字库,方便适用-character generator, it will automatically generate arbitrary font size to facilitate application

在Linux下的命令大全，各种命令的含义和使用时候的格式。-Under the Linux command Daquan, the meaning and use of a variety of command when the format.