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