插入排序

#include<iostream>
using namespace std;

int main()
{
    int num[] = {23,12,54,3,26,88,21};

    for(int j=1;j<7;j++)
    {
        int key = num[j];
        int i=j-1;
        while(i>=0 && num[i]>key)
        {
            num[i+1] = num[i];
            i--;
        }
        num[i+1] = key;
    }    

    for(int i=0;i<7;i++)
        cout<<num[i]<<" ";
    return 0;
}