<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="utf-8" />
<title>排序</title>
<script language="javascript" type="text/javascript">
function MarkRandomArray() {
var a = [];
for (var _i = 0; _i < 10; _i++) {
a[_i] = parseInt(Math.random() * 100);
}
return a;
}
//选择排序
function SelectSort(a) {
var _swapCnt = 0;
var _loopCnt = 0;
for (var _i = 0; _i < a.length; _i++) {
_loopCnt++;
var _hasMin = false;
var _iMin = _i;
var _loopCnt2 = 0;
for (var _i2 = _i + 1; _i2 < a.length; _i2++) {
_loopCnt2++;
if (a[_iMin] > a[_i2]) {
_iMin = _i2;;
_hasMin = true;
}
}
_loopCnt = _loopCnt + (_loopCnt2 > 0 ? _loopCnt2 - 1 : 0);
if (_hasMin) {
_swapCnt += 2;
var _aV = a[_i];
a[_i] = a[_iMin];
a[_iMin] = _aV;
console.log(_i, " : ", a);
}
}
console.log(" _swapCnt= ", _swapCnt);
console.log(" _loopCnt= ", _loopCnt);
}
//冒泡排序
function PopuSort(a) {
var _swapCnt = 0;
var _loopCnt = 0;
for (var _i = 0; _i < a.length; _i++) {
_loopCnt++;
var _iLastSwap = -1;
var _loopCnt2 = 0;
for (var _i2 = a.length - 1 ; _i2 > _i; _i2--) {
_loopCnt2++;
var _iPrev = _i2 - 1;
if (a[_i2] < a[_iPrev]) {
_swapCnt += 2;
var _aV = a[_iPrev];
a[_iPrev] = a[_i2];
a[_i2] = _aV;
_iLastSwap = _i2;
}
}
_loopCnt = _loopCnt + (_loopCnt2 > 0 ? _loopCnt2 - 1 : 0);
if (_iLastSwap > 0) {
console.log(_i, " : ", a);
_i = _iLastSwap - 1;
} else {
break;
}
}
console.log(" _swapCnt= ", _swapCnt);
console.log(" _loopCnt= ", _loopCnt);
}
//插入排序
function InsertSort(a) {
var _swapCnt = 0;
var _loopCnt = 0;
for (var _i = 0; _i < a.length - 1; _i++) {
_loopCnt++;
var _iNext = _i + 1;
if (a[_i] > a[_iNext]) {
var _iIns = 0;
var _loopCnt2 = 0;
for (var _i2 = _i - 1 ; _i2 >= 0; _i2--) {//包含0元素
_loopCnt2++;
if (a[_i2] < a[_iNext]) {
_iIns = _i2 + 1;
break;
}
}
_loopCnt = _loopCnt + (_loopCnt2 > 0 ? _loopCnt2 - 1 : 0);
var _aV = a[_iNext];
for (var _i3 = _iNext ; _i3 > _iIns; _i3--) {
_swapCnt++;
a[_i3] = a[_i3 - 1];
}
_swapCnt++;
a[_iIns] = _aV;
console.log(_iIns, " : ", a);
}
}
console.log(" _swapCnt= ", _swapCnt);
console.log(" _loopCnt= ", _loopCnt);
}
function GoSort(sortFn) {
var _ary = MarkRandomArray();
console.log(_ary);
console.log("----------Sort----------------");
console.log("----------Start----------------");
sortFn(_ary);
console.log("----------END----------------");
console.log(_ary);
}
</script>
</head>
<body>
<button onclick="GoSort(SelectSort)">选择排序</button>
<button onclick="GoSort(PopuSort)">冒泡排序</button>
<button onclick="GoSort(InsertSort)">插入排序</button>
</body>