冒泡排序
var arr =[9,4,6,7,5,8]
for (var i=0;i<=arr.length;i++){
var temp = arr[i]
arr[i] = arr[i+1]
arr[i+1] =temp
}
console.log(arr)
选择排序
var arr=[9,3,6,2,4,1]
for(var j=0;j<arr.length-1;j++){
var minIndex = j;
for(var i = j+1;i<arr.length;i++){
if(arr[i]<arr[minIndex]){
minIndex = i
}
}
var temp = arr[j]
arr[j] = arr[minIndex]
arr[minIndex] = temp
}
console.log(arr)