（1）求一个6*6阶矩阵对角线元素之和。（2）实现打印数出有10个元素的浮点数组a中的最大值和最小值。（3）求面积。（4）产生两个小按钮。（5）程序的作用是用Math.random() 函数产生20个随机数。-(1) for a 6* 6 bands and the matrix of diagonal elements. (2) to achieve print a few out there are 10 elements in a floating-point group of maximum and minimum values. (3) for the area. (4) are two small buttons. (5) the role of procedures is Math.random () functions to generate random numbers 20.相关搜索： Matrix
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