week12 蔣

 WEEK12

week12-1_printf_fprintf

#include <stdio.h>

int main()

{

    FILE*fout=fopen("file.txt","w");

    printf("Hello World\n");

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

}

week12-2_scanf

#include <stdio.h>

int main()

{

    char line[20];

    FILE*fin=fopen("file.txt","r");

    fscanf(fin,"%s",line);

    printf("讀到了:%s\n",line);

    fscanf(fin,"%s",line);

    printf("讀到了:%s\n",line);

}

week12-3_fopen_fdose_fprintf

#include <stdio.h>

int main()

{

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

    FILE*fout=fopen("file3.txt","w");

    for(int i=0;i<10;i++){

        fprintf(fout,"%d",a[i]);

        printf("%d ",a[i]);

    }

    fclose(fout);

    int b[10];

    FILE*fin=fopen("file3.txt","r");

    for(int i=0;i<10;i++){

        fscanf(fin,"%d",&b[i]);

        printf("%d ",b[i]);

    }

    fclose(fin);

}

week12-4_keyboard_mouse

#include <stdio.h>

#include <GL/glut.h>

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)

{

    teapotX = (x-150)/150.0;

    teapotY = (150-y)/150.0;

    display();

}

int main(int argc, char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week12");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMainLoop();

}

再改一下程式碼

#include <stdio.h>

#include <GL/glut.h>

float teapotX=0,teapotY=0;

FILE*fout = NULL;

FILE*fin = NULL;

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)

{

    teapotX = (x-150)/150.0;

    teapotY = (150-y)/150.0;

    if(state==GLUT_DOWN){

        if(fout==NULL) fout = fopen("file4.txt","w");

        fprintf(fout,"%f %f\n",teapotX,teapotY);

    }

    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);

    display();

}

int main(int argc, char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week12");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMainLoop();

}

///CodeBlocks的專案設定 Project-Properties裡第二個Build Target

///Executing working dir工作執行目錄

///原本是C:\Users\Administrator\Desktop\freeglut\bin

///改成  .  (小數點)再File-Save Everything便能將專案檔設好、存檔

///之後你的工作執行目錄就在你的程式專案的那一目錄裡

///但執行後，就會少了freeglut.dll檔，你再手動copy到你的專案檔裡

///就可以看到  .cbp CodeBlocks Projects專案裡 working dir有變動