week14

 1.練習開檔，寫檔，關檔

#include <stdio.h>

int main()

{

    FILE * fout=fopen("file.txt","w+");

    printf("Hellow World\n");

    fprintf(fout,"Hellow World\n");

    fclose(fout);

}

 2.練習開檔，讀檔，關檔

#include <stdio.h>

int main()

{

    FILE * fout=fopen("file2.txt","w+");

    fprintf(fout,"angle %d\n",999);

    fclose(fout);

    char line[200];

    int a;

    FILE * fin =fopen("file2.txt","r");

    fscanf(fin,"%s %d",line,&a);

    printf("讀到了字串:%s 及整數%d\n",line,&a);

    fclose(fin);

}

3.TRT_angle_write

#include <GL/glut.h>

#include <stdio.h>

float angle[20], oldX=0;

int angleID=0;

FILE * fout =NULL;

void mywrite(){

if(fout==NULL) fout=fopen("file.txt","w+");

for(int i=0;i<20;i++){

        printf("%0.2f",angle[i]);

    fprintf(fout,"%0.2f",angle[i]);

}

printf("\n");

fprintf(fout,"\n");

}

void keyboard(unsigned char key,int x,int y){

if(key=='0') angleID=0;

if(key=='1') angleID=1;

if(key=='2') angleID=2;

if(key=='3') angleID=3;

}

void mouse(int button,int state,int x,int y){

    oldX=x;

}

void motion(int x,int y){

    angle[angleID]+=(x-oldX);

    mywrite();

    oldX=x;

    glutPostRedisplay();

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glColor3f(1,1,1);

    glRectf(0.3,0.5,-0.3,-0.2);

    glPushMatrix();

    glTranslatef(0.3,0.5,0);

    glRotatef(angle[0],0,0,1);

    glTranslatef(-0.3,-0.4,0);

    glColor3f(1,0,0);glColor3f(1,0,0);

    glRectf(0.3,0.5,0.8,0.3);

    glPushMatrix();

    glTranslatef(0.8,0.4,0);

    glRotatef(angle[1],0,0,1);

    glTranslatef(-0.8,-0.4,0);

    glColor3f(0,1,0);

    glRectf(0.8,0.5,1.1,0.3);

    glPopMatrix();

    glPopMatrix();

    glPushMatrix();

    glTranslatef(-0.3,0.5,0);

    glRotatef(angle[2],0,0,1);

    glTranslatef(0.3,-0.4,0);

    glColor3f(1,0,0);glColor3f(1,0,0);

    glRectf(-0.3,0.5,-0.8,0.3);

    glPushMatrix();

    glTranslatef(-0.8,0.4,0);

    glRotatef(angle[3],0,0,1);

    glTranslatef(0.8,-0.4,0);

    glColor3f(0,1,0);

    glRectf(-0.8,0.5,-1.1,0.3);

    glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutInitWindowSize(300,300);

    glutCreateWindow("week13_rect_TRT");

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutDisplayFunc(display);

    glutMainLoop();

    return 0;

}

4.TRT_angle_write_and_read

#include <GL/glut.h>

#include <stdio.h>

float angle[20], oldX=0;

int angleID=0;

FILE * fout =NULL,*fin=NULL;

void mywrite(){

if(fout==NULL) fout=fopen("file.txt","w+");

for(int i=0;i<20;i++){

        printf("%0.2f",angle[i]);

    fprintf(fout,"%0.2f",angle[i]);

}

printf("\n");

fprintf(fout,"\n");

}

void myRead(){

if(fout!=NULL) fclose(fout);

if(fin==NULL) fin=fopen("file.txt","r");

for(int i=0;i<20;i++){

    fscanf(fin,"%f",&angle[i]);

}

glutPostRedisplay();

}

void keyboard(unsigned char key,int x,int y){

    if(key=='r'){

        myRead();

    }

if(key=='0') angleID=0;

if(key=='1') angleID=1;

if(key=='2') angleID=2;

if(key=='3') angleID=3;

}

void mouse(int button,int state,int x,int y){

    oldX=x;

}

void motion(int x,int y){

    angle[angleID]+=(x-oldX);

    mywrite();

    oldX=x;

    glutPostRedisplay();

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glColor3f(1,1,1);

    glRectf(0.3,0.5,-0.3,-0.2);

    glPushMatrix();

    glTranslatef(0.3,0.5,0);

    glRotatef(angle[0],0,0,1);

    glTranslatef(-0.3,-0.4,0);

    glColor3f(1,0,0);glColor3f(1,0,0);

    glRectf(0.3,0.5,0.8,0.3);

    glPushMatrix();

    glTranslatef(0.8,0.4,0);

    glRotatef(angle[1],0,0,1);

    glTranslatef(-0.8,-0.4,0);

    glColor3f(0,1,0);

    glRectf(0.8,0.5,1.1,0.3);

    glPopMatrix();

    glPopMatrix();

    glPushMatrix();

    glTranslatef(-0.3,0.5,0);

    glRotatef(angle[2],0,0,1);

    glTranslatef(0.3,-0.4,0);

    glColor3f(1,0,0);glColor3f(1,0,0);

    glRectf(-0.3,0.5,-0.8,0.3);

    glPushMatrix();

    glTranslatef(-0.8,0.4,0);

    glRotatef(angle[3],0,0,1);

    glTranslatef(0.8,-0.4,0);

    glColor3f(0,1,0);

    glRectf(-0.8,0.5,-1.1,0.3);

    glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutInitWindowSize(300,300);

    glutCreateWindow("week13_rect_TRT");

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutDisplayFunc(display);

    glutMainLoop();

    return 0;

}