輸入：n個數（a1,a2........)

輸出：升序排列好的陣列

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,j,n,a[100];
    printf("請輸入要排序的陣列個數：");
    scanf("%d",&n);
    printf("請輸入要排序的陣列：");
    for(i=0;i<n;i++)
    {
    scanf("%d",&a[i]);
    }
   // printf("%d",sizeof(a));
    insertion_sort(a,n);
    for(j=0;j<n;j++)
    {
    printf("%d",a[j]);
    printf(" ");
    }

}
int insertion_sort(int a[],int n){
    int i,j,key;
    for(j=1;j<n;j++)
    {
        key=a[j];
        //insert a[j] into the sorted sequence a[1....j-1]
        i=j-1;
        while(i>=0&&a[i]>key){
            a[i+1]=a[i];
            i=i-1;
        }
        a[i+1]=key;
    }
    return a;
}