week14 涵030 上課筆記

程式碼如下:

14-1:

#include <stdio.h>

int main()

{

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

    printf("Hello World\n");

    fprintf(fout,"Hello World\n");

    fclose(fout);

}

14-2:

#include <stdio.h>

int main()

{

    FILE * fout = fopen("file2.txt","w+");

    fprintf(fout,"angle1 %d\n",999);

    fclose(fout);

    char line[200];

    int a;

    FILE * fin = fopen("file2.txt","r");

    fscanf(fin,"%s %d",line,&a);

    printf("讀到了字串:%s 及整數%d\n",line,a);

    fclose(fin);

}

14-3

14-4

14-5

用R來更新

#include<gl/glut.h>

#include <stdio.h> ///fopen、printf、fscanf、fprintf

float angle[20],oldX=0;///設定角度

int angleID=0;

FILE * fout = NULL;

void mywrite()

{

    if(fout==NULL) fout = fopen("file.txt","w+");

    for(int i=0;i<20;i++){

            printf( "%.2f",angle[i]);

        fprintf(fout,"%.2f",angle[i]);

    }

    printf("\n");

    fprintf(fout,"\n");

}

void myRead(){

    if(fout!=NULL) {

            fclose(fout);

    fou=NULL; 

    }

    if(fin==NULL) fin = fopen("file.txt","r");

    for(int i=0;i<20;i++){

        fscanf(fin,"%f",&angle[i]);

    }

    glutPostRedisplay();

}

void keyboard( unsigned char key,int x,int y){

    if( key =='r') {

        myRead();

    }

    if( key =='0') angleID=0;

    if( key =='1') angleID=1;

    if( key =='2') angleID=2;

    if( key =='3') angleID=3;

}

void mouse(int button,int state,int x,int y){

    oldX = x;

}

void motion(int x,int y){

    angle[angleID] += (x-oldX);

    mywrite();

    oldX = x;

    glutPostRedisplay();///重畫螢幕

}

14-7

鬧鐘程式碼如下

#include <GL/glut.h>

#include <stdio.h>

void timer(int t)

{

    printf("鬧鐘%d,起床了\n", t);

    printf("設定下一個鬧鐘\n");

    glutTimerFunc(1000, timer, t+1);

    printf("設定好鬧鐘, 回去睡回籠覺\n");

}

void display()

{

}

int main(int argc,char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week14 timer");

    glutTimerFunc(3000, timer, 0);

    glutDisplayFunc(display);

    glutMainLoop();

}

會讓電腦狂響的鬧鐘程式碼:

#include <GL/glut.h>

#include <mmsystem.h>

#include <stdio.h>

void timer(int t)

{

    printf("鬧鐘%d,起床了\n", t);

    PlaySound("do.wav", NULL, SND_ASYNC);

    printf("設定下一個鬧鐘\n");

    glutTimerFunc(1000, timer, t+1);

}

void display()

{

}

int main(int argc,char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week14 timer");

    glutTimerFunc(3000, timer, 0);

    glutDisplayFunc(display);

    glutMainLoop();

}