【JavaScript】7-36 复数四则运算 (15 分)

题目：

本题要求编写程序，计算2个复数的和、差、积、商。

输入格式：

输入在一行中按照a1 b1 a2 b2的格式给出2个复数C1=a1+b1i和C2=a2+b2i的实部和虚部。题目保证C2不为0。

输出格式：

分别在4行中按照(a1+b1i) 运算符 (a2+b2i) = 结果的格式顺序输出2个复数的和、差、积、商，数字精确到小数点后1位。如果结果的实部或者虚部为0，则不输出。如果结果为0，则输出0.0。

输入样例1：

2 3.08 -2.04 5.06

 

 

输出样例1：

(2.0+3.1i) + (-2.0+5.1i) = 8.1i
(2.0+3.1i) - (-2.0+5.1i) = 4.0-2.0i
(2.0+3.1i) * (-2.0+5.1i) = -19.7+3.8i
(2.0+3.1i) / (-2.0+5.1i) = 0.4-0.6i

 

 

 

 

输入样例2：

1 1 -1 -1.01

 

 

输出样例2：

(1.0+1.0i) + (-1.0-1.0i) = 0.0
(1.0+1.0i) - (-1.0-1.0i) = 2.0+2.0i
(1.0+1.0i) * (-1.0-1.0i) = -2.0i
(1.0+1.0i) / (-1.0-1.0i) = -1.0

 

 

 

 

JavaScript代码：

  1 const { parse } = require('path')
  2 let readline = require('readline')
  3 
  4 const rl = readline.createInterface({
  5     input: process.stdin,
  6     output: process.stdout
  7 })
  8 
  9 rl.on('line',function(line){
 10     let tokens = line.split(' ')
 11     let a1 = parseFloat(tokens[0])
 12     let b1 = parseFloat(tokens[1])
 13     let a2 = parseFloat(tokens[2])
 14     let b2 = parseFloat(tokens[3])
 15 
 16     let ret = main(a1, b1, a2, b2)
 17     console.log(ret)
 18 })
 19 
 20 function main(a1, b1, a2,b2) {
 21     let ret = new String()
 22     let mid1 = new String()
 23     let mid2 = new String()
 24 
 25     if (b1 < 0) {
 26         mid1 = ''
 27     } else {
 28         mid1 = '+'
 29     }
 30 
 31     if (b2 < 0) {
 32         mid2 = ''
 33     } else {
 34         mid2 = '+'
 35     }
 36     
 37 
 38     ret = '(' + a1.toFixed(1) + mid1 + b1.toFixed(1) + 'i' + ')' + ' + ' + '(' + a2.toFixed(1) + mid2 + b2.toFixed(1) +'i' + ')' + ' = ' + dealData( sum(a1, b1, a2,b2) ) + '\n' + '(' + a1.toFixed(1) + mid1 + b1.toFixed(1) + 'i' + ')' + ' - ' + '(' + a2.toFixed(1) + mid2 + b2.toFixed(1) +'i' + ')' + ' = ' + dealData( difference(a1, b1, a2,b2) ) + '\n' + '(' + a1.toFixed(1) + mid1 + b1.toFixed(1) + 'i' + ')' + ' * ' + '(' + a2.toFixed(1) + mid2 + b2.toFixed(1) +'i' + ')' + ' = ' + dealData( product(a1, b1, a2,b2) ) + '\n' + '(' + a1.toFixed(1) + mid1 + b1.toFixed(1) + 'i' + ')' + ' / ' + '(' + a2.toFixed(1) + mid2 + b2.toFixed(1) +'i' + ')' + ' = ' + dealData( quotient(a1, b1, a2,b2) )
 39 
 40     return ret
 41 }
 42 
 43 function sum(a1, b1, a2,b2) {
 44     let treal = a1 + a2
 45     let timag = b1 + b2
 46     let frac = {
 47         real : treal.toFixed(1),
 48         imag : timag.toFixed(1)
 49     }
 50 
 51     return frac
 52 }
 53 
 54 function difference(a1, b1, a2,b2) {
 55     let treal = a1 - a2
 56     let timag = b1 - b2
 57     let frac = {
 58         real : parseFloat(treal).toFixed(1),
 59         imag : parseFloat(timag).toFixed(1)
 60     }
 61 
 62     return frac
 63 }
 64 
 65 function product(a1, b1, a2,b2) {
 66     let treal = a1 * a2 - b1 * b2
 67     let timag = a1 * b2 + a2 * b1
 68     let frac = {
 69         real : parseFloat(treal).toFixed(1),
 70         imag : parseFloat(timag).toFixed(1)
 71     }
 72 
 73     return frac
 74 }
 75 
 76 function quotient(a1, b1, a2,b2) {
 77     let treal = (a1 * a2 + b1 * b2) / (a2 * a2 + b2 * b2)
 78     let timag = (a2 * b1 - a1 * b2) / (a2 * a2 + b2 * b2)
 79     let frac = {
 80         real : parseFloat(treal).toFixed(1),
 81         imag : parseFloat(timag).toFixed(1)
 82     }
 83 
 84     return frac
 85 }
 86 
 87 function dealData(frac) {
 88     let ret = new String()
 89     let mid = new String()
 90 
 91     if (frac.imag < 0) {
 92         mid = ''
 93     } else {
 94         mid = '+'
 95     }
 96     if (frac.real == 0.0 && frac.imag == 0.0) {
 97         ret = frac.real
 98     }
 99     else if (frac.real == 0.0 && frac.imag != 0.0) {
100         ret = frac.imag + 'i'
101     }
102     else if (frac.real != 0.0 && frac.imag == 0.0) {
103         ret = frac.real
104     }
105     else if (frac.real != 0.0 && frac.imag != 0.0) {
106         ret = frac.real + mid + frac.imag + 'i'
107     }
108 
109     return ret
110 }

 

posted @ 2021-03-02 09:24  moonskies  阅读(169)  评论(0)  编辑  收藏  举报