#include<stdio.h>
#define N 5
void copy_arr(double source[],double target1[],int a);
void copy_ptr(double *source,double *target2,int b);

int main(void)
{
    double source[N]={1.1,2.2,3.3,4.4,5.5};
    double target1[N]={0};
    double target2[N]={0};
    printf("2ù×÷Ç°:\n "); 
    printf("source:\t%g\t%g\t%g\t%g\t%g\n",source[0],source[1],source[2],source[3],source[4]);
    printf("target1:\t%g\t%g\t%g\t%g\t%g\n",target1[0],target1[1],target1[2],target1[3],target1[4]);
    printf("target2:\t%g\t%g\t%g\t%g\t%g\n",target2[0],target2[1],target2[2],target2[3],target2[4]);
    copy_arr(source,target1,5);
    copy_ptr(source,target2,5);
    printf("2ù×÷oó:\n");
    printf("source :\t%g\t%g\t%g\t%g\t%g\n",source[0],source[1],source[2],source[3],source[4]);
     printf("target1:\t%g\t%g\t%g\t%g\t%g\n",target1[0],target1[1],target1[2],target1[3],target1[4]);
     printf("target2:\t%g\t%g\t%g\t%g\t%g\n",target2[0],target2[1],target2[2],target2[3],target2[4]);
    return 0;
}
void copy_arr(double source[],double target1[],int a)
{
    int i;
    for(i=0;i<a;i++)
    {
        source[i]=target1[i];
    }
     
}
void copy_ptr(double *source,double *target2,int a)
{
    int i;
    for(i=0;i<a;i++)
    {
        *(source+i)=*(target2+i);
    }
}

正确显示如下：
Before operation:
source :        1.1     2.2     3.3     4.4     5.5
target1:        0       0       0       0       0
target2:        0       0       0       0       0
After operation:
source :        1.1     2.2     3.3     4.4     5.5
target1:        1.1     2.2     3.3     4.4     5.5
target2:        1.1     2.2     3.3     4.4     5.5

        //source[i]=target1[i];
        target1[i]=source[i];

        //*(source+i)=*(target2+i);
        *(target2+i)=*(source+i);

谢谢！