C++深入讲解类与封装的概念与使用

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#include <stdio.h>

structBiology

{

boolliving;

};

structAnimal : Biology

{

boolmovable;

voidfindFood()

{

}

};

structHuman : Animal

{

voidsleep()

{

printf("I'm sleeping...\n");

}

voidwork()

{

printf("I'm working...\n");

}

};

structGirl : Human

{

private:

intage;

intweight;

public:

voidprint()

{

age = 22;

weight = 48;

printf("I'm a girl, I'm %d years old.\n", age);

printf("My weight is %d kg.\n", weight);

}

};

structBoy : Human

{

private:

intheight;

intsalary;

public:

intage;

intweight;

voidprint()

{

height = 175;

salary = 9000;

printf("I'm a boy, my height is %d cm.\n", height);

printf("My salary is %d RMB.\n", salary);

}

};

intmain()

{

Girl g;

Boy b;

g.print();

b.age = 19;

b.weight = 120;

//b.height = 180;

b.print();

return0;

}

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#include <stdio.h>

inti = 1;

structTest

{

private:

inti;

public:

intj;

intgetI()

{

i = 3;

returni;

}

};

intmain()

{

inti = 2;

Test test;

test.j = 4;

printf("i = %d\n", i);// i = 2;

printf("::i = %d\n", ::i);// ::i = 1;

// printf("test.i = %d\n", test.i); // Error

printf("test.j = %d\n", test.j);// test.j = 4

printf("test.getI() = %d\n", test.getI());// test.getI() = 3

return0;

}