31 lines
560 B
C++
31 lines
560 B
C++
// 静态成员函数， 内部只能访问静态成员变量
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#include <iostream>
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#include <cstring>
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#include <cstdlib>
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using namespace std;
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class A
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{
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public:
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int m;
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static int x;
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static void add(int n)
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{
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// m = 10; // error, 静态成员函数不能访问非静态成员
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x += n;
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cout << "static x = " << x << endl;
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}
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};
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int A::x = 20; // 静态变量的初始化
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int main()
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{
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A a1;
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A::add(10); // static x = 30
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cout << "a1.x = " << a1.x << endl; // a1.x = 30
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return 0;
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}
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