binhun-week12

今天教檔案讀寫

先試著開檔，寫檔

fopen("檔案 ","模式 ")

 打上程式碼:

如果想要在程式中又讀又寫，要用fopen配上fclose把程式關起來讓後面的檔案繼續做事

開新專案

更改檔案位置

再把freeglut檔案複製過去

第二個也改成小數點要file save everything

#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();

        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("flie4.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();

}