waveinFFT_demo

fluent软件的UDF程序，是焊接过程的热源，热源类型为双椭球空间热源。(fluent udf heat source)

处理大规模矩阵，对大规模的矩阵进行分解，即形如分解A=UV(To deal with large-scale matrix, mass matrix decomposition, that is shaped like a decomposition A = UV)

说明：  用Doolittle式的LU分解来求解线性方程组。(Solve the linear equations using Doolittle LU Decomposition!)

用C++编写的一维和二维快速傅里叶变换程序(Prepared with C++ one-dimensional and two-dimensional fast Fourier transform procedure)

之前找不到合适精度的log2x函数的定点化源码，经过实现并验证后，发上来大家一起学习(fixed version for log2x)

糊涂先生给他的五个朋友写信，他写了五封信，但是当他的朋友收到信后，都告诉他：“你的信寄错了”。那么请你计算一下：出现这种情况的概率有多少？（假设糊涂先生是随机地往信封里装信的），你能不能把所有的情况都列出来呢(Mr. foolish to write him five friends, he wrote five letters, but when his friend received a letter, told him: )

这是一个小型计算器，功能强大，用户输入想要计算的数据，即可自行计算出结果。(This is a program about calculator,and it is very userful.)

Dot Matrix 5 x 7 sample progmam , hope you enjoy

一个小的瞬变电磁测深数据处理程序，主要用于计算视电阻率和深度.(a small transient electromagnetic sounding data processing procedures, mainly used in the calculation of the apparent resistivity and depth )

PRE IN POST OREDER TRAVERSAL C++ CODE VISUAL