程序代码：

#include<stdio.h>
void copy_arr(double[],double[],int);
void copy_ptr(double*,double*,int);
int main()
{
    double source[5]={1.1,2.2,3.3,4.4,5.5};
    double target1[5],target2[5];
    int i;
    copy_arr(source,target1,5);
    copy_ptr(source,target2,5);
    for(i=0;i<5;i++)
        printf("%lf,%lf\n",target1[i],target2[i]);
    return 0;
}
void copy_arr(double source[],double target[],int numbers)
{
    int i;
    for(i=0;i<numbers;i++)
        target[i]=source[i];
}
void copy_ptr(double*source,double*target,int numbers)
{
    int i;
    for(i=0;i<numbers;i++)
        *(target+i)=*(source+i);
}