示例

class ClassA {

private:satic int NUMBER1=5;
private:static char LETTER1;
private:char LETTER2;
};


解决方案 所有 static 字段应该在声明时初始化
示例

class ClassA {

private:satic int NUMBER1=5;
private:static char LETTER1='c';
private:char LETTER2;
};