你能否在不传递指针的情况下通过函数交换两个变量的值，如果可以请说明方法，如果不行请分析原因。?计算机？ 第1页

       static intptr_t b1 = 0; static intptr_t b2 = 0;  void calc_impl() { #define v1 *(int*)(b1 - (intptr_t)&tmp) #define v2 *(int*)(b2 - (intptr_t)&tmp)      int tmp = v1;      v1 = v2;     v2 = tmp; }  void calc() {     int a = 2;     int b = 3;     b1 = (intptr_t)&a + b2;     b2 += (intptr_t)&b;     calc_impl(); }  void swap() {     int base = 0;     b2 = (intptr_t)&base;     calc(); }  void test_swap() {     int a = 10;     int b = 5;     printf("%d %d
", a, b);      swap(); // do not need any pointer here      printf("%d %d
", a, b); }