week12

 

#include <stdio.h>

int main()

{  ///檔案指標 fout=開檔案("檔名","用什麼模式")

    FILE*fout = fopen("flie.txt","w");///w:write

    printf("Hellow World\n");

    fprintf(fout,"Hellow World在檔案裡\n");

}

#include <stdio.h>

int main()

{

    int a[10]={10,20,30,40,50,60,70,80,90,100};

    int b[10]={};

    FILE*fout=fopen("file3.txt","w");

    for(int i=0;i<10;i++){

        printf("%d",a[i]);

        fprintf(fout,"%d",a[i]);

    }

    printf("\n");

    fprintf(fout,"\n");

    fclose(fout);

    FILE *fin=fopen("file3.txt","r");

    for(int i=0;i<10;i++){

        fscanf(fin,"%d",&b[i]);

        printf("b%d:%d",i,b[i]);

    }

    fclose(fin);

}

///在按mouse時,除了改teapotX,teapotY座標,並重劃

#include <stdio.h>

#include <GL/glut.h>

FILE*fout=NULL; ///一開始檔案沒有開,NULL

FILE*fin=NULL;///要用讀檔的指標,一開始也是NULL

float teapotX=0,teapotY=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(teapotX,teapotY,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    if(state==GLUT_DOWN){

        teapotX = (x-150)/150.0;

        teapotY = (150-y)/150.0;

        if(fout==NULL) fout=fopen("file4.txt","w");///沒開檔,就開

        fprintf(fout,"%f %f\n",teapotX,teapotY);///要再存座標

    }

    display();

}

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

{

    if(fin==NULL){

        fclose(fout);

        fin=fopen("file4.txt","r");

    }

    fscanf(fin,"%f %f",&teapotX,&teapotY);

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week12");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}