选择排序&快速排序

/////////selectSort
//cases:
//5
//20
//1 45 14 23 45 15 15 13 456 1 4165 456 123 436 13 6 456 651 65 6
//10
//1 5 8 9 6 4 5 3 8 6 
//30
//1 4 2 7 1 7 8 9 2 4 1 4 2 7 1 7 8 9 2 4 1 2 3 7 4 8 5 9 4 2
//4
//1 2 3 8
//5
//1 57 8 9 6
#include <stdio.h>
#define SIZE 1000
int data[SIZE];

void selectSort(int n)
{
    for(int i=0;i<n;i++)
    {
        int max = 0;
        int maxPos = 0;
        for(int j=i;j<n;j++)
        {
            if(data[j]>max)
            {
                max = data[j];
                maxPos = j;
            }
        }
        data[maxPos] = data[i];
        data[i] = max;
    }
}



int main(void)
{
    //freopen("input.txt","r",stdin);
    int ncases;
    scanf("%d",&ncases);
    for(int i=0;i<ncases;i++)
    {
        int n;
        scanf("%d",&n);
        for(int i=0;i<n;i++)
        {
            scanf("%d",&data[i]);
        }
        selectSort(n);
        for(int i=0;i<n;i++)
        {
            printf("%d ",data[i]);
        }
        printf("\n");
    }
    return 0;
}

////////quickSort
//case:
//5
//20
//1 45 14 23 45 15 15 13 456 1 4165 456 123 436 13 6 456 651 65 6
//10
//1 5 8 9 6 4 5 3 8 6 
//30
//1 4 2 7 1 7 8 9 2 4 1 4 2 7 1 7 8 9 2 4 1 2 3 7 4 8 5 9 4 2
//4
//1 2 3 8
//5
//1 57 8 9 6
#include <stdio.h>
#define SIZE 1000
int data[SIZE];


int partition(int l, int r, int data[]){
    int i = l - 1;
    int j = r;
    int key = data[r];

    while(1)
    {
        while(data[++i] < key) ;
        while(data[--j] > key && j >= i) ;
        {
        if(i >= j) break;
        int tmp = data[i];
        data[i] = data[j];
        data[j] = tmp;
        }
    }
    data[r] = data[i];
    data[i] = key;
    return i;
}

void quickSort(int l, int r, int data[]){
    if(l >= r) return;

    int pos = partition(l, r, data);
    quickSort(l, pos - 1, data);
    quickSort(pos + 1, r, data);
}

void quickSort(int l,int r,int data[])
{
    if(l >= r) return;

    int pos = partition(l,r,data);
    quickSort(1,pos-1,data);
    quickSort(pos+1,r,data);
}



int main(void)
{
    //freopen("input.txt","r",stdin);
    int ncases;
    scanf("%d",&ncases);
    for(int i=0;i<ncases;i++)
    {
        int n;
        scanf("%d",&n);
        for(int i=0;i<n;i++)
        {
            scanf("%d",&data[i]);
        }
        quickSort(0,n-1,data);
        for(int i=0;i<n;i++)
        {
            printf("%d ",data[i]);
        }
        printf("\n");
    }
    return 0;
}