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How to define a function that can receive three numbers and output
- 一个新手Original
- 2017-09-21 10:04:062474browse
Define a function that can receive three numbers, and implement the sorted output of three numbers in the function body → (declaration and call of the function that returns the value in javascript)
Analysis of "bit operator" Knowledge:
4. Bit operators
Tags: >> << & | ^
&: Bitwise AND, determine parity; do bitwise AND between any number and 1, if the result is 1, it is an odd number; if the result is 0, it is an even number
|: Bitwise OR, for Decimal rounding; any decimal is bitwise ORed with 0, and if it is saved, the integer part is taken
^: Bitwise XOR, used to exchange two numbers
a = a^b; b = b^a; a = a^b;
Abbreviation: a^=b; b^=a; a^=b;
<!doctype html>
<html lang="en">
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<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" style="text/css" href="">
<style></style>
<script></script>
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<body>
<!
定义一个可以接收三个数字的函数，函数体内实现三个数字的排序输出
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<script>
function sortNum(a,b,c){
//如果将最小的数字赋值给a,将最大的数字赋值给c
//1.比较a与b的大小关系，如果a>b的话，则交换两个数字，则a中存放的就是 a和b 的最小值。
a>b && (a^=b,b^=a,a^=b);
//2.比较b与c的大小关系，如果b>c的话，则交换两个数字，则b中存放的就是 b和c 的最小值;则c中存放的是3个数字中的最大值。
b>c && (b^=c,c^=b,b^=c);
//3.最后在比较a与b中的（两个最小值的大小）大小关系，如果a>b的话，则交换两个数字，则a中存放的就是 a和b 的最小值。
a>b && (a^=b,b^=a,a^=b);
console.log(a,b,c);
}
</script>
<button onclick="sortNum(52,36,98)">三个数字的排序</button>
</body>
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