ziiiiitg-Week12

Week12

檔案File

新增一個空檔案 名稱更為week12-1_printf_fprintf.cpp

打上程式碼

#include <stdio.h>

int main()

{

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

    printf("Hello World\n"); 

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

}

新增一個空檔案 名稱更為week12-2_scanf_fscanf.cpp

打上程式碼

#include <stdio.h>

int main()

{

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

    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);

}

重複兩次一樣程式碼是因為字和字之間有空格 它不會讀到空格後的東西 

新增一個空檔案 名稱更為week12-3_manynumbers_scanf_printf_fscanf_fprintf.cpp

打上程式碼

#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]);

    }

    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, a[i]);

    }

    fclose(fin);

}

fclose是關掉檔案 因為不能同時讀入讀出同一檔案 

所以要先關掉再打開

鍵盤、滑鼠

新增一個GLUT專案，名稱更為week12-4_keyboard_mouse

打上程式碼

#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();

}

執行後 只要滑鼠點哪裡 茶壺就會在哪裡

因為它的目錄在freeglut資料夾裡的bin資料夾

不在專案裡很麻煩

 

1.Project > Properties > Build targets > Debug > Execution working dir

裡面的目錄改成 " . "

把freeglut > bin資料夾裡頭的freeglut.dll複製到專案資料夾裡頭

2.Project > Properties > Build targets > Release > Execution working dir

裡面的目錄改成 " . "

執行後用滑鼠點出茶壺路徑 再按鍵盤就會重複剛才 ( 滑鼠 ) 的動作