Deverra//week12檔案

 

WEEK12 

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▧了解檔案讀取

到Code::Blocks中打開空白檔案>>

A--

#include<stdio.h>
int main()
{
    FILE * fout = fopen("file.txt","w"); //w = write //檔案出現在桌面
    printf("Hello World\n");
    fprintf(fout,"Hello World在檔案裡\n");
}

新朋友>>fprintf

B--

#include<stdio.h>
int main()
{
    FILE * fin = fopen("file.txt","r"); //r = read
    char line[50];
    fscanf(fin,"%s",line);
    printf("從檔案中讀到: %s\n",line);
    fscanf(fin,"%s",line);
    printf("從檔案中讀到: %s\n",line);
}

C--

#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]); //上下都要空格才會讀取成功
    }
    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);
}

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▧今天的第一個專案 (會跟著滑鼠移動的茶壺)

#include<GL/glut.h>
#include<stdio.h>
float teapotX, teapotY;
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) //點下去就會執行
    {
        teapotX = (x-150)/150.0;
        teapotY = (150-y)/150.0;
    }
    display();
}
int main(int argc, char *argv[])
{
  glutInit(&argc, argv);
  glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
  glutCreateWindow("week12");
  glutDisplayFunc(display);
  glutMouseFunc(mouse);
  glutMainLoop();
}

#include<GL/glut.h>
#include<stdio.h>
FILE * fout = NULL;
FILE * fin = NULL;
float teapotX, teapotY;
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("file4.txt","w");
        fprintf(fout, "%f %f",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_RGB | GLUT_DOUBLE | GLUT_DEPTH);
  glutCreateWindow("week12");
  glutDisplayFunc(display);
  glutMouseFunc(mouse);
  glutKeyboardFunc(keyboard);
  glutMainLoop();
}

>>>>>>>>更改工作執行目錄<<<<<<<<<

到project > Properties > Bulid targets > 找到working dr >  把一長長串改成" . "

再到檔案總管中, 把freeglut.dll複製到week12-4的檔案中

做到這部點run會顯示沒有找到檔案

把dll檔複製過來

**記得記得要save everything!!!

下下週交作業( 轉動模型 )