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插入排序有错误 #31

@XJ-Up

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@XJ-Up

“j”的取值范围应该 “j>=0”
public void insertSort(int[] arr) {
int len = arr.length;
//要插入的数
int insertNum;
//因为第一次不用,所以从1开始
for (int i = 1; i < len; i++) {
insertNum = arr[i];
//序列元素个数
int j = i - 1;
//从后往前循环,将大于insertNum的数向后移动
while (j >= 0 && arr[j] > insertNum) {
//元素向后移动
arr[j + 1] = arr[j];
j--;
}
//找到位置,插入当前元素
arr[j + 1] = insertNum;
}
}

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