在程序中如何更改缺省打印机，在vb下如何做到？

simulation of 24 pulse isolated. it is the best compared with 12 pulse and below in power factor. it can be achieved with 12 pulse and simple pulse doubling circuit.

数字钟的解决方案 基于proteus的c代码 希望对你们受用-Digital clock solution is based on the Proteus of the c code you wish to benefit

通过鼠标可以控制图片的缩放功能,我把该功能模块封装成用户自定义控件了,希望对大家能够有用!-Mouse can be controlled through a zoom feature picture, I package the functional modules into a custom control users, and hope we can be useful!

一个关于BPSK误码率仿真的程序，内容只包括误码率仿真部分！-One on BPSK BER simulation procedures, including the signal generated by adding Gaussian white noise, and bit error rate!

先进先出堆栈,简单，易读。将时序逻辑和组合逻辑分别列入不同过程块，适合初学者阅读。-first in firt out

最短路径和最小生成树-shortest path and minimum spanning tree

一个归并排序的程序-sort of a merging process

数制转换器,可以在二进制,十进制,十六进制间转换,蛮实用的-Number System converter, can be binary, decimal, hexadecimal inter-conversion, pretty and practical

关于图形旋转的C语言原代码，对C语言初学者有很大帮助。-Graphics rotation on C language source code for C language has a lot to help beginners.

工业铲车的PLC操作控制,《机电传动控制课程设计》报告-Of industrial forklift operation control PLC