26 lines
519 B
C++
26 lines
519 B
C++
// 类的静态成员变量的声明、初始化与访问
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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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static int x;
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};
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int A::x = 20; // 静态变量初始化，静态成员变量初始化时不需要 static
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int main()
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{
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A a1, a2;
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// 访问类的静态成员: 1) A::x, 2) 对象名.x
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cout << "A::x = " << A::x << endl; // 20
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A::x = 30;
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cout << "a1.x = " << a1.x << endl; // 30
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cout << "a2.x = " << a2.x << endl; // 30
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return 0;
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} |