Lisa的電腦圖學 - week12

 ➤ Week12-1_printf_fprintf.cpp

     1. 開啟CodeBlocks ，新增File ➝ New ➝ Empty file，令存新檔為week12-1_printf_fprintf.cpp

    2. 輸入程式碼，

#include <stdio.h>

int main()

{

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

    printf("Hello World\n");

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

}

 ➤ Week12-2_scanf_fscanf.cpp

     1. 開啟CodeBlocks ，新增File ➝ New ➝ Empty file，令存新檔為week12-2_scanf_fscanf.cpp

     2. 輸入程式碼，

#include <stdio.h>

int main()

{

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

    char line[100];

    fscanf(fin, "%s", line);

    printf("從file.txt讀到了: %s\n", line);

    fscanf(fin, "%s", line);

    printf("從file.txt讀到了: %s\n", line);

}

 ➤ Week12-3_many_numbers_scanf__printf_fscanf_fprintf.cpp

     1. 開啟CodeBlocks ，新增File ➝ New ➝ Empty file，令存新檔為week12-3_many_numbers_scanf__printf_fscanf_fprintf.cpp

     2. 輸入程式碼，

#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);

}

 ➤ Week12-4_keyboard_mouse

        1. 開啟CodeBlocks ，新增OpenGL專案，File ➝ New ➝ Project

     2. 選取GLUT Project ➝ Go ➝ Next

    3. 點選三個點，點選目錄在桌面，加上專案名字 week12-4_keyboard_mouse，Next ➝ Finish

     4. 點選 week12-4_keyboard_mouse ➝ Sources ➝ main.c，刪除所有程式碼，並輸入

#include <stdio.h>

#include <GL/glut.h>

FILE*fout=NULL;

FILE*fin=NULL;

float teapotX=0,teapotY=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslated(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");

        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);

    glutMouseFunc(mouse);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}

     5. 右鍵點選 week12-4_keyboard_mouse ➝ Properties ➝ Build targets，將Execution working dir 改為小數點 .

     6. 將freeglut ➝ bin裡的freeglut.dull複製到week12-4_keyboard_mouse裡

     7.  點選File ➝ Save everything ，儲存所有設定與檔案