把 Maxwell 方程式在时间和空间领域上进行差分化。利用蛙跳式(Leap frog algorithm)--空间领域内的电场和磁场进行交替计算，通过时间领域上更新来模仿电磁场的变化，达到数值计算的目的。-The Maxwell equations in time and space on the field differencing. Using the leapfrog (Leap frog algorithm)- Space field for alternating electric

Leap year program in c

一个有关判断是否为闰年的java小程序,初学者可以下载来-A Java applet about judge whether it is a leap year, can be downloaded to the novice