shen_week12

 第12周

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

會跳出Hello World在檔案裡

再開一個.cpp

#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 執行

接著新增一個新的GLUT專案

檔案名為week12-4_keyboard_mouse

用程式設計出一個可以隨著滑鼠點到哪裡

茶壺就移動到哪裡的程式

#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();

}

茶壺就會隨著鼠標移動瞜~~~

改上一個程式碼

#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上方設置路徑，Project>Properties>Build targets把路徑改成 . ，然後save everything

這樣檔案的位置才會是對的!!