单选题

有以下程序

#include <stdio.h>

void fun (int a, int b)

{

    int t;

    t=a; a=b; b=t; 

 }

main()

{

    int c[10]={1, 2, 3, 4, 5, 6, 7, 8, 9, 0}, i; 

    for (i=0; i<10; i+=2)

    fun (c[i], c[i+1]);

    for(i=0; i<10; i++)

    printf("%d,", c[i]);

    printf("\n");

}

程序的运行结果是(    )

A

2,1,4,3,6,5,8,7,0,9,

B

0,9,8,7,6,5,4,3,2,1,

C

1,2,3,4,5,6,7,8,9,0,

D

0,1,2,3,4,5,6,7,8,9,

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