看程序写结果：
#include<stdio.h> void fun( int *a, int *b ) { int *k; k = a; a = b; b = k; } int main() { int a = 3, b = 6, *x = &a, *y = &b; fun( x, y ); printf( "%d,%d ", a, b ); }
输出：_______________________________
