week12 zhou

 Week12

首先開啟codeblock 新增一個新的檔案 .cpp

#include <stdio.h>

int main()

{

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

    printf("Hello World\n");

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

}

打上以上程式碼 執行

結果就會如下圖

開啟一個.cpp檔案

#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);

}

打上以上程式碼 並且執行

執行結果如下圖

新增一個新的.cpp檔案

#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++){

        fprintf(fin,"%d", b[i]);

        printf("%d ",b[i]);

    }

    fclose(fin);

}

打上以上程式碼並且執行

執行結果如下

新增一個新的GLUT專案

檔案名為week12-4_keyboard_mouse

用程式製作出一個可以隨著滑鼠點到哪裡

茶壺就到哪裡的程式

#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();

}

執行程式碼就會出現以下畫面囉

將剛剛的程式碼新增且修改為以下程式碼

紅色的部分為新增的程式碼

#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;

    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();

}

執行結果如下圖

接著再將程式碼修改為以下程式碼

#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();

}

接著照著上周的步驟將執行工作的路徑

改成在自己的資料夾不是在freeglut裡執行

先到project  properties裡面

                                    

接著到下圖紅框的地方的路徑改成

一個 . 

                    

再把 freeglut.dll移動到12-4的資料夾