(完整word版)南邮Web技术第四章作业

Web技术 第四章作业

———————————作业4.2—————————————

Write, test, and debug (if necessary) JavaScript scripts for the problems that follow. When required to write a function, you must include a script to test the function with at least two different data sets. In all cases,

for testing, you must write an XHTML file that references the JavaScript file.

4.2 Output : The first 20 Fibonacci numbers, which are defined as in the sequence

1, 1, 2, 3, …

whereeach number in the sequence after the second is the sum of the two previous numbers. You mustuse document.write to produce the output.

结果截图：

———————————作业4.11—————————————

4.11 Function : counter

Parameter : An array of numbers.

Returns : The numbers of negative elements, zeros, and values greater than zero in the given array.

Note : You must use a switch statement in the function.

结果截图：

———————————作业4.13—————————————

4.13 Function : row_averages

Parameter : An array of arrays of numbers.

Returns : An array of the averages of each of the rows of the given matrix.

//输出第二个

结果截图：