C语言之交两数值的两种方法

1.值传递

swap(int i,int j){
   int temp =  i;
    i = j;
    j = temp;
}

2.引用传递

swap2(int* pointer1,int* pointer2){
  int temp = *pointer1;
 *pointer1 = *pointer2;
*pointer2 = temp;
}