Static 变量的初始化

#include <iostream>
using namespace std;
class staticDemo {
static int x;
static int y;
public:
void print() const {
cout << "x: " << x << endl
<< "y: " << y << endl;
}
};
int staticDemo::x = 10;
int staticDemo::y = 100;
int main() {
staticDemo sd;
sd.print();
}

#include <iostream>
using namespace std;
class values {
// vc6.0当中，不支持类内部对static const int初始化，
// 但是我们可以放到类定义的外部初始化，编译常量性失效
static const int x;
static const float y;
static const int a[5];
public:
void print() const {
cout << "x: " << x << endl
<< "y: " << y << endl;
cout << "array is: " << endl;
for(int i = 0; i < 5
an style="color: rgb(0, 0, 204);">; i++) {
cout << a[i] << endl;
}
}
};
const int values::x = 10;
const float values::y = 3.1415;
const int values::a[] = {
10, 20, 30, 40, 50
};
int main() {
values vs;
vs.print();
}

//
arrays, non-intergal and non-const static
// must initialized
externally