单项选择题

有下列程序:
#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.1,2,3,4,5,6,7,8,9,0
B.2,1,4,3,6,5,8,7,0,9
C.0,9,8,7,6,5,4,3,2,1
D.0,1,2,3,4,5,6,7,8,9