ww-week12-檔案讀寫_鍵盤.滑鼠控制角度

一.檔案讀寫

1. 第一個範例(fprintf) : 開啟Empty file檔案:week12-1_printf_fprintf.cpp / 開、寫檔案

#include <stdio.h>

int main()

{///檔案指標fout= 開檔案("檔名","用什麼模式")

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

    printf("Hello World!\n");

    fprintf(fout,"Hello World!在桌面!");

}

2.第二個範例(fscanf) : 開啟Empty file檔案:week12-2_scanf_fscanf.cpp / 讀寫檔案

#include <stdio.h>

int main()

{

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

    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);

}

3.第三個範例(結合) : 開啟Empty file檔案:week12-3_many_number_scanf_printf_fscanf_fprintf.cpp / 寫讀檔案

 

#include <stdio.h>

int main()

{

    int a[10]={10,20,30,40,50,60,70,80,90,100};

    int b[10]={};

    ///write

    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);///關起flie3

    ///read

    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);

}

二、鍵盤.滑鼠控制角度

1.mouse控制茶壺位置 : 開新project:week12-4_keyboard_mouse / 寫程式 / 當滑鼠走到哪茶壺就會走到哪

#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)

{

    if(state==GLUT_DOWN)

    {

        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();

}

2. keyboard加入 :  加入keyboard函式,讓滑鼠點到的地方可以自己存,按空白鍵可以重複剛才的路徑

3.更改工作執行目錄 : 在codeblock內 / project properties / build target / 設定Debug和release的工作執行目錄成: . /接著開啟C:\Users\Administrator\Desktop\freeglut\bin / 將freeglut.dll複製到week12-4資料夾 / 全部儲存

#include <stdio.h>

#include <GL/glut.h>

FILE * fout=NULL;///step2-2

FILE * fin =NULL;///2

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("file4.txt","w");///2

        fprintf(fout,"%f %f\n",teapotX,teapotY);///2

    }

    display();

}

void keyboard(unsigned char key ,int x,int y)///2keyboard函式

{

    if(fin==NULL){///2如果檔案還沒fopen(),就開他

        fclose(fout);///2前面的mouse會開fout 指標,所以要關掉

        fin = fopen("file4.txt","r");///2開檔

    }

    fscanf(fin,"%f %f",&teapotX,&teapotY);///2讀檔

    display();///2重畫畫面

}

int main(int argc, char *argv[])

{

glutInit(&argc, argv);

glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week12");

glutDisplayFunc(display);

glutMouseFunc(mouse);

glutKeyboardFunc(keyboard);///2keboard要做事了

    glutMainLoop();

}

三、為作業做準備

開新專案 : Final_project / 在codeblock內 / project properties / build target / 設定Debug和release的工作執行目錄成: . /接著開啟C:\Users\Administrator\Desktop\freeglut\bin / 將freeglut.dll複製到week12-5資料夾 / 複製week12-4的程式碼 / 全部儲存

git指令

cd desktop

git clone https://github.com/你的帳號/2023graphicsa

cd 2023graphicsa

加入檔案

git add . 

git status

git config --global user.email "jsyeh@mail.mcu.edu.tw"

git config --global user.name "jsyeh"

git commit -m "week10"

git push