采用函数调用应该怎么弄呀第8题

void exchange(int *n1,int *n2)
{
    int t;
    t=*n1;
    *n1=*n2;
    *n2=t;
}

int main()
{
    int a=2;int b=3;
    printf("%d %d\n",a,b);
    exchange(&a,&b);
    printf("%d %d\n",a,b);
    
    return 0;
}