4.11.3

4.36

i *= static_cast<int>(d);

4.37

int i; double d; const string *ps; char *pc; void *pv;pv = (void*)ps; // pv = const_cast<string*>(ps); 或者 pv = static_cast<void*>(const_cast<string*>(ps));i = int(*pc);   // i = static_cast<int>(*pc);pv = &d;        // pv = static_cast<void*>(&d);pc = (char*)pv; // pc = reinterpret_cast<char*>(pv);

4.38

double slope = static_cast<double>(j/i);

j/i 的结果转化为double 然后赋值给slope