归并排序C语言传值问题

 #include "stdio.h"
typedef int RecType;
#include "malloc.h"

//将两个有序子文件合并成一个有序文件
void Merge(RecType *R,int low,int m,int high){
    RecType *R1;
    int i=low;
    int j=m+1;
    int p=0;
    R1=(RecType *)malloc(sizeof(RecType)*(high-low+1));//为新数组申请空间
    while(i<=m&&j<=high)//两个子文件都没完
    {
        R1[p++]=(R[i++]<R[j++])?R[i++]:R[j++];
    }
    while(i<=m){
        R1[p++]=R[i++];
    }
    while(j<=high){
        R1[p++]=R[j++];
    }
    for(p=0,i=low;i<=high;i++,p++){
        R[i]=R1[p];
    }
}
void MergeSort(RecType R[],int low,int high){
    int mid;
    if(low<high){
        mid=(high+low)/2;
        MergeSort(R,low,mid);
        MergeSort(R,mid+1,high);
        Merge(R,low,mid,high);
    }
}


void main(){
    RecType a[]={1,5,2,7,8,4,9};
    int low=0,high=6;
    int i;
    for(i=low;i<=high;i++){
        printf("%d ",a[i]);
    }
    printf("\n");
    MergeSort(a,low,high);
    for(i=low;i<=high;i++){
        printf("%d ",a[i]);
    }
}

为什么排序之后a数组的值好像都是地址

http://www.cnblogs.com/beyond-Acm/p/4334145.html