再讨论 指针间相加减

先看一端具体代码html struct S{ 240 int a; 241 int b; 242 int c; 243 }; 244 245 struct S s; 246 247 int *p1, *p2; 248 int diff; 249 p1 = (int*)&s; 250 p2 = &(s

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