指针
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#include <iostream>using namespace std;int main(){// & : 取值操作符// * : 定义指针的操作符int ival = 8;// 值int *pi = &ival;// 指针pi指向ival的地址；*pi是ival的值；int **ppi = π// 指针ppi指向pi的地址；**ppi是*pi的值，即ival的值；cout << "ival: " << ival << "\n";// 值cout << "&ival: " << &ival << "\n";// ival的地址cout << "*pi: " << *pi << "\n";// 值，相当于ivalcout << "pi: " << pi << "\n";// ival的地址cout << "&pi: " << &pi << "\n";// pi的地址cout << "**ppi: " << **ppi << "\n";// 值cout << "*ppi: " << *ppi << "\n";// pi的值，即ival的地址cout << "ppi: " << ppi << "\n";// pi的地址cout << "&ppi: " << &ppi << "\n";// ppi的地址cout << endl;return 0;} /* Output:ival: 8&ival: 0012FF60*pi: 8pi: 0012FF60&pi: 0012FF54**ppi: 8*ppi: 0012FF60ppi: 0012FF54&ppi: 0012FF48*/
