#include<stdio.h>#include<time.h>#include<stdlib.h>int main(){    /*生成随机数组*/    srand(time(0));//随机种子    int arr[10000];    int n = sizeof(arr) / 4;    for (int i = 0; i < n; i++){        arr[i] = 100 * rand() / RAND_MAX;    }    double  start, end;    start = clock();//取开始时间/*选择排序*/    int i = 1;    for (i; i < n; i++){        for (int j=i; j >-1; j--){            if (arr[j] < arr[j - 1]){                int    t = arr[j-1];                arr[j-1] = arr[j];                arr[j] = t;            }        }    }/*输出*/    for (int k = 0; k < n; k++)    {        printf("%3d_", arr[k]);    }    end = clock();//取结束时间    printf("%f seconds\n", (end - start) / CLOCKS_PER_SEC);//计算程序运行时间}