感觉懒惰？没问题！

Question

我需要将一个整数分成两个数字。像是除以2之类的东西，但我只想要整数分量，例如：

6 = 3 and 3
7 = 4 and 3

我尝试了以下内容，但我不确定它是最佳解决方案。

var number = 7;
var part1 = 0;
var part2 = 0;

if((number % 2) == 0) {
    part1 = number / 2;
    part2 = number / 2;
}
else {
    part1 = parseInt((number / 2) + 1);
    part2 = parseInt(number / 2);
}

这就是我想要的，但我不认为这段代码是干净的。

有更好的方法吗？

Answer 1

Just find the first part and subtract it from the original number.

var x = 7;

var p1 = Math.floor(x / 2);
var p2 = x - p1;

console.log(p1, p2);

In the case of x being odd, p1 will receive the smaller of the two addends. You can switch this around by calling Math.ceil instead.

Answer 2

让javascript为你做Math。

var x = 7;
var p1 = Math.ceil(x / 2);
var p2 = Math.floor(x / 2);
console.log(p1, p2);

Answer 3

您的代码可以简化一下：

var num = 7;
var p1 = Math.floor(num / 2);
var p2 = p1;

if (num % 2 != 0) {
   p1++;
}
console.log(p1, p2);

Answer 4

＆＃13;

var num = 7;

var part1 = parseInt(num/2);
var part2 = num - part1;

console.log(part1, part2);

＆＃13;

Answer 5

另一种方法是使用按位运算符。它不适用于非常大的数字

＆＃13;

function splitter(number){
  part1 = (number>>1) + (number&1);
  part2 = number>>1;
  console.log(number + ":", part1 + "+" + part2);
}

splitter(7);
splitter(6);
splitter(2**30+1); // Breaks for values greater than 2**31
splitter(2**31+1);

＆＃13;

Answer 6

＆＃13;

var x = 11;             
var a = Math.ceil(x/2);   
var b = x-a;             

console.log("x = " + x + " , a = " + a + " , b = " + b);

＆＃13;

Answer 7

如果您不希望输出为consecutive或完全相同，但又希望'将整数分成两个数字，这就是您的解决方案：

function printSeparatedInts(num) {
  let smallerNum = Math.floor(Math.random() * Math.floor(num));
  if (num && smallerNum === (num/2)) {    // checking if input != 0 & output is not consecutive
    printSeparatedInts(num)
   } else {
    console.log(smallerNum, (num - smallerNum))
  }
}

printSeparatedInts(22)
printSeparatedInts(22)     // will likely print different output from above
printSeparatedInts(7)

Answer 8

感觉懒惰？没问题！

我自豪地向你展示了一个发电机对象！

初始化它并使用它！ 它会每隔一次使用自动更改值，即使在同一行!!

用法：a = new splitter(n)然后console.log(a+" and "+a)

＆＃13;

function splitter(n){
    this.p1 = Math.floor(n/2);
    this.p2 = n-this.p1;
    this.cnt=0;
    this.valueOf= ()=> (++this.cnt%2)? this.p1:this.p2;
    return n;
}

a = new splitter(5);
console.log(a + " and " +a);
console.log(a + " and " +a);
console.log(a + " and " +a);

b = new splitter(11);
console.log(b + " and " +b);

＆＃13;

Answer 9

var number = 7;
var part1 = 0;
var part2 = 0;

if(number == 0) {
    part1 = (part2 = 0);
    console.log(part1, part2);
}
else if(number == 1) {
    part1 = 1;
    part2 = 0;
    console.log(part1, part2);
}
else if((number % 2) == 0) {
    part1 = part2 = number / 2;
    console.log(part1, part2);
}
else {
    part1 = (number + 1) / 2;
    part2 = number - part1;
    console.log(part1, part2);
}

只有其他解决方案，我认为表现还可以。

Answer 10

或者这样：）

, and

Answer 11

var n = 7;
var p1 = (n - (n % 2)) / 2;
var p2 = (n + (n % 2)) / 2;

console.log(p1, p2);

将整数分成两个（几乎）相等的部分

11 个答案:

感觉懒惰？没问题！