c++学习第二天

访问控制

类似java当中的封装  属性为私有,通过set get 方法来赋值和取值.

this->name = name;
//区别java中this.name = name;

第一种

  #include <stdio.h>


class Person {
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 = %s\n", name, age, work); 
}
};


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


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

return 0;

}

第二种

#include <stdio.h>


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 = %s\n", name, age, work); 
}
};


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


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

return 0;
}