1) OOP 2) ( ) 3.2) printf Number3-2.cpp #include <stdio.h> class Number Number(); // ~Number(); // void setnumber(float n); float getnumber();
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1 : : : G :2008/07/ /08/17
2 1) OOP 2) ( ) 3.2) printf Number3-2.cpp #include <stdio.h> class Number Number(); // ~Number(); // void setnumber(float n); float getnumber();
3 private: float num; ; Number::Number() printf("construct an instance of the Number\n"); Number::~Number() printf("destruct the instance of the Number\n"); void Number::setNumber(float n) num = n; float Number::getNumber() return num; int main(void) // // a b c d printf("a\n"); printf("the main function is started.\n"); printf("b\n"); Number n; printf("c\n"); n.setnumber(5); printf("d\n"); printf("number is %f\n", n.getnumber() ); printf("e\n"); printf("the main function is finished.\n"); printf("g\n"); return 0;
4 %./Number3-2 a The main function is started. b Construct an instance of the Number c d number is e The main function is finished. g Destruct the instance of the Number int main(void) b c Construct an instance of the Number " printf("b\n"); Number n; printf("c\n"); Number n; Number::Number()printf Dstrruct the instance of the Number g main 3.3) printf Number3-3.cpp #include <stdio.h> class Number Number(); // ~Number(); // void setnumber(float n); float getnumber();
5 private: float num; ; Number::Number() printf("construct an instance of the Number\n"); Number::~Number() printf("destruct the instance of the Number\n"); void Number::setNumber(float n) num = n; float Number::getNumber() return num; int main(void) printf("a\n"); printf("the main function is started\n"); printf("b\n"); Number pnum = new Number; // printf("c\n"); Number num2; // printf("d\n"); pnum->setnumber(5); printf("e\n"); num2.setnumber(6); printf("f\n"); printf("number = %f Number2 = %f\n", pnum->getnumber(), num2.getnumber() ); printf("g\n"); delete pnum; printf("h\n");
6 printf("the main function is finished\n"); printf("i\n"); return 0; %./Number3-3 a The main function is started b Construct an instance of the Number c Construct an instance of the Number d e f Number = Number2 = g Destruct the instance of the Number h The main function is finished i Destruct the instance of the Number 3.2 main 3.2 Number pnum = new Number; Number num2;deleat pnum; main 3.4) File File class File //File // File(); void open(char filename); void write(char data); void read(char out_data);
7 void close(); FILE file_descriptor; File file_descriptor OS OS private 3.5) (Number) (ComplexNumber) (Number ) Number3-5.cpp #include <stdio.h> class Number // Number Number(); // ~Number(); // void setnumber(float n); float getnumber(); private: float num; ; Number::Number() printf("construct an instance of the Number\n"); Number::~Number() printf("destruct the instance of the Number\n"); void Number::setNumber(float n) num = n;
8 float Number::getNumber() return num; class ComplexNumber : public Number // Number ComplexNumber(); ~ComplexNumber(); void setimaginary(float i); // float getimaginary(); // private: float imaginarynumber; ; ComplexNumber::ComplexNumber() printf("construct an instance of ComplexNumber\n"); ComplexNumber::~ComplexNumber() printf("destruct the instance of ComplexNumber\n"); // set(get)imaginary void ComplexNumber::setImaginary(float i) imaginarynumber = i; float ComplexNumber::getImaginary() return imaginarynumber; int main(void) printf("a\n"); ComplexNumber cn; printf("b\n"); cn.setnumber(5);
9 printf("c\n"); cn.setimaginary(0.5); printf("d\n"); printf("complexnumber = (%f,%f)\n", cn.getnumber(), cn.getimaginary() ); printf("e\n"); return 0; %./Number3-5 a Construct an instance of the Number Construct an instance of ComplexNumber b c d ComplexNumber = ( , ) e Destruct the instance of ComplexNumber Destruct the instance of the Number ComplexNumber ComplexNumber ~ComplexNumbersetImaginary getimaginary public imaginarynumber private main ComplexNumber cn; Number ComplexNumber retrun 0;ComplexNumberNumber 3.6) main 3 print Number3-6.cpp #include <stdio.h> #include <string.h> class Printable //print //Printable
10 //print Printable() // virtual void print() = 0; // = 0. ; class PrintableNumber : public Printable //print Number PrintableNumber(float n) num = n; // // virtual void print(); float getnumber() return num; private: float num; ; void PrintableNumber::print() printf("number = %f\n", getnumber()); printf("void PrintableNumber \n"); class PrintableString : public Printable //print PrintableString(char s) strcpy(str_buf, s); virtual void print(); char getstring() return str_buf; private: char str_buf[256]; // ; void PrintableString::print() printf("string = %s\n", getstring() ); printf("void PrintableString \n"); int main(void) Printable plist[3] ; plist[0] = new PrintableNumber(5); // plist[1] = new PrintableNumber(6);
11 plist[2] = new PrintableString("some string"); int i; for(i=0; i<3; i++) plist[i]->print(); // //plist[i] print %./Number3-6 number = void PrintableNumber number = void PrintableNumber string = some string void PrintableString 1 plist[0] = new PrintableNumber(5);PrintableNumber print PrintableNumber 2 plist[1] = new PrintableNumber(6); PrintableNumber print PrintableNumber 3 plist[2] = new PrintableString("some string");printablestring print PrintableString 3.7) java extends interface (extends) extends (interface) interface 4.1) lineart C C++
12 4.2) C++ C++ main.cpp / main.cpp lineart lineart.c, lineart.cpp / #include <GLUT/glut.h> #include <stdlib.h> // for malloc #include balls.h static Animation anim(20); // void display(void) glclear(gl_color_buffer_bit); anim.draw(); glflush(); // void idle(void) anim.forward(); display(); // // usleep(10000); //
13 void init(void) glclearcolor(0.0, 0.0, 0.0, 1.0); //. int main(int argc, char argv[]) glutinit(&argc, argv); glutinitdisplaymode(glut_rgba); glutcreatewindow(argv[0]); glutdisplayfunc(display); glutidlefunc(idle); init(); glutmainloop(); return 0; balls.cpp / balls.cpp lineart lines.c, lines.cpp / #include <OpenGL/gl.h> #include <glut/glut.h> #include <stdlib.h> #include "balls.h" // #define BALL_RAD 0.1 // //0 f float frand(float f) return (float)rand() / RAND_MAX f;
14 //BALL void Ball::forward(int i,int num_balls, Ball b) int j; float n; pos.add(vel); // pos vel // if(pos.x < -1 pos.x > 1) vel.x = -vel.x; if(pos.y < -1 pos.y > 1) vel.y = -vel.y; / balls.c void forwardanimation / // for(j=0; j<num_balls; ++j) Ball b2 = b+j-i; if(i!=j) / a b (BALL_RAD). ab / /BALL b b2 BALL_RAD / if( (b->pos.x-b2->pos.x)(b->pos.x-b2->pos.x) +(b->pos.y-b2->pos.y)(b->pos.y-b2->pos.y) <=(2BALL_RAD)(2BALL_RAD) ) // // b->col = Color( frand(1), frand(1), frand(1) ); b2->col = Color( frand(1), frand(1), frand(1) ); // n = b->vel.x; b->vel.x = b2->vel.x; b2->vel.x = n; n = b->vel.y; b->vel.y = b2->vel.y; b2->vel.y = n;
15 //BALL void Ball::draw() glcolor3f(col.r, col.g, col.b); // glpushmatrix(); gltranslatef(pos.x, pos.y, 0); glutsolidsphere(ball_rad, 16, 2); // glpopmatrix(); //ANIMATION (num:) Animation::Animation(int num) balls = new Ball[num]; num_balls = num; int i, j; // Animation for(i=0; i<numballs(); ++i) // balls[i] = Ball(Vector2(frand(2.0)-1, frand(2.0)-1),vector2(frand(0.001), frand(0.001)),color((i & 4) / 4, (i & 2) / 2, i & 1)); //ANIMATION void Animation::forward() int i; for(i=0; i<num_balls; ++i) Ball b = balls+i; b->forward(i, num_balls, b); //ANIMATION void Animation::draw() int i;
16 for(i=0; i<num_balls; ++i) Ball b = balls+i; b->draw(); balls.h / balls.h / #include "types.h" class Ball Ball() Ball(Vector2 ipos, Vector2 ivel, Color icol) pos = ipos; vel = ivel; col = icol; // void forward(int i, int num_balls, Ballb); // void draw(); // private: Vector2 pos; // Vector2 vel; // Color col; // ; // class Animation Animation(int num); void setball(int i, Ball p); //? int numballs() return num_balls; // void draw(); // void forward(); //? private: int num_balls; // Ball balls; // ; //
17 types.h / color.h / class Vector2 Vector2() // Vector2(float ix, float iy) x = ix; y = iy; void add(vector2 rhs) // x += rhs.x; y += rhs.y; float x; float y; ; class Color Color() // Color(float ir, float ig, float ib) r = ir; g = ig; b = ib; float r; float g; float b; ; Makefile LOADLIBES = -framework glut -framework OpenGL CC = g++ -Wall balls:main.o balls.o main.o:balls.h types.h balls.o:balls.h types.h types.o:types.h clean: rm balls.o ~
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joho07-1.ppt
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P06.ppt
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