#include<iostream>
#include<stdlib.h>
#include<iomanip>
using namespace std;
void ssort(float *, int );
int main(void) {
int i, seed=6523, n=20;
srand(seed);
float list[20], *pf;
for(i=0; i<n; i++) { //生成n 个随机数并输出
//cout<<seed<<endl;
list[i] = rand( );
cout<<setw(8)<<list[i]<<" ";
if ((i+1)%8==0)
cout<<endl;
}
cout<<endl;
pf=&list[0];
ssort (pf, n); //对n 个数排序
i=0;
while ( i<n ) { //输出排序的n 个数
cout<<setw(8)<<list[i]<<" ";
i++;
if (i % 8 == 0)
cout<<endl;
}
cout<<endl;
}
void swap1(float *a, float *b){ //交换两个变量的值
float temp;
temp = *a;
*a = *b;
*b = temp;
}
void ssort (float *a, int m){
int i, j, index;
float elem;
for (i=0;i<m-1;i++)
{
elem = *(a+i);
index = i;
for (j=i+1;j<m;j++)
if (*(a+j)>elem){
elem = *(a+j);
index = j;
}
swap1(a+i, a+index);
}
}
