嵌入式linux基础：c++（二）访问控制

• 1. 访问控制

有三种，分别是public ,protected , private
private只提供内部的函数使用
public类外的程序可以使用

#include 

class Person {//类的首字母应该大写
private:
	char *name;
	int age;
	char *work;

public:
	void setName(char *n)
	{
		name = n;
	}
	int setAge(int a)
	{
		if (a < 0 || a > 150)
		{
			age = 0;
			return -1;
		}
		age = a;
		return 0;
	}
	void printInfo(void)
	{
		printf("name = %s, age = %d, work = %sn", name, age, work); 
	}
};

int main(int argc, char **argv)
{
	Person per;//称per是一个类的对象

	//per.name = "zhangsan";
	per.setName("zhangsan");
	per.setAge(200);
	per.printInfo();
	
	return 0;
}

做一些小的改进，当前对象

class Person {
private:
	char *name;
	int age;
	char *work;

public:
	void setName(char *name)
	{
		this->name = name;
	}
	int setAge(int age)
	{
		if (age < 0 || age > 150)
		{
			this->age = 0;
			return -1;
		}
		this->age = age;
		return 0;
	}
	void printInfo(void)
	{
		printf("name = %s, age = %d, work = %sn", name, age, work); 
	}
};

int main(int argc, char **argv)
{
	Person per;

	//per.name = "zhangsan";
	per.setName("zhangsan");
	per.setAge(200);
	per.printInfo();
	
	return 0;
}