Step 1 : Reading & Writing
1-1. Hello World!
1-2. Result at CMD
1-3. File writing
1-4. Result at CMD
Code:
#include <stdio.h>int main(){ printf("Hello World!"); FILE* fout=fopen("file.txt","w+"); fprintf(fout,"Hello World!"); fclose(fout); return 0;}
1-5. Automatically add file when it don't exist
Code:
#include <stdio.h>
int main(){
printf("Hello World!");
FILE* fout=fopen("file.txt","w+");
fprintf(fout,"Hello World!");
fclose(fout);
return 0;
}
1-6. Content of file
1-7. File writing & reading
1-8. Result at CMD
Code:
#include <stdio.h>
int main(){
FILE*fout=fopen("file2.txt","w+");
fprintf(fout,"angle %d\n",999);
fclose(fout);
char line[200];
int a;
FILE* fin=fopen("file2.txt","r");
fscanf(fin,"%s %d",line,&a);
printf("讀到字串:%s 及整數:%d\n",line,a);
fclose(fin);
return 0;
}
1-9. Automatically add file when it don't exist
1-10. Content of file
Step 2 : Using CodeBlocks to do File Writing and Reading
2-1. Coding
2-2. Build & Run
Code:#include <GL/glut.h>
#include <stdio.h>
float angle[20],oldX=0;
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 keyboard(unsigned char key,int x,int y){
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();
}
void display(){
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1);///white
glRectf(0.3, 0.5, -0.3, -0.2);///body
glPushMatrix();
glTranslatef(0.3,0.5,0);///hanging on (0.5,0.5)
glRotatef(angle[0],0,0,1);///Rotate
glTranslatef(-0.3,-0.4,0);///Translate Rotating point to O(0,0)
glColor3f(1,0,0);///red arms
glRectf(0.3,0.5,0.8,0.3);///arms
glPushMatrix();
glTranslatef(0.8,0.4,0);
glRotatef(angle[1],0,0,1);
glTranslatef(-0.8,-0.4,0);
glColor3f(0,1,0);///green
glRectf(0.8,0.5,1.1,0.3);
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.3,0.5,0);///hanging on (0.5,0.5)
glRotatef(angle[2],0,0,1);///Rotate
glTranslatef(0.3,-0.4,0);///Translate Rotating point to O(0,0)
glColor3f(1,0,0);///red arms
glRectf(-0.3,0.5,-0.8,0.3);///arms
glPushMatrix();
glTranslatef(-0.8,0.4,0);
glRotatef(angle[3],0,0,1);
glTranslatef(0.8,-0.4,0);
glColor3f(0,1,0);///green
glRectf(-0.8,0.5,-1.1,0.3);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int main(int ac,char**av,char**ev){
glutInit(&ac,av);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(600,600);
glutCreateWindow("Week14 TRT");
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutDisplayFunc(display);
glutMainLoop();
}
2-3. "file.exe" in work file
2-4. Coding
Code:#include <GL/glut.h>
#include <stdio.h>
float angle[20],oldX=0;
int angleID=0;
FILE*fout=NULL,*fin=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);
fout=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();
}
void display(){
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1);///white
glRectf(0.3, 0.5, -0.3, -0.2);///body
glPushMatrix();
glTranslatef(0.3,0.5,0);///hanging on (0.5,0.5)
glRotatef(angle[0],0,0,1);///Rotate
glTranslatef(-0.3,-0.4,0);///Translate Rotating point to O(0,0)
glColor3f(1,0,0);///red arms
glRectf(0.3,0.5,0.8,0.3);///arms
glPushMatrix();
glTranslatef(0.8,0.4,0);
glRotatef(angle[1],0,0,1);
glTranslatef(-0.8,-0.4,0);
glColor3f(0,1,0);///green
glRectf(0.8,0.5,1.1,0.3);
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.3,0.5,0);///hanging on (0.5,0.5)
glRotatef(angle[2],0,0,1);///Rotate
glTranslatef(0.3,-0.4,0);///Translate Rotating point to O(0,0)
glColor3f(1,0,0);///red arms
glRectf(-0.3,0.5,-0.8,0.3);///arms
glPushMatrix();
glTranslatef(-0.8,0.4,0);
glRotatef(angle[3],0,0,1);
glTranslatef(0.8,-0.4,0);
glColor3f(0,1,0);///green
glRectf(-0.8,0.5,-1.1,0.3);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int main(int ac,char**av,char**ev){
glutInit(&ac,av);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(600,600);
glutCreateWindow("Week14 TRT");
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutDisplayFunc(display);
glutMainLoop();
}
2-5. Using Notepad++ to open ".cbp" file
2-6. Change work file
Step 3: Using CodeBlocks to do make a timer
3-1. Coding
3-2. Build & Run
Code:
#include <GL/glut.h>
#include <stdio.h>
void timer(int t){ ///t單位ms
printf("鬧鐘%d,我起床了\n設定下個鬧鐘\n",t);
glutTimerFunc(1000,timer,t+1);
printf("設好鬧鐘,再睡回去\n");
}
void display(){
}
int main(int ac,char**av){
glutInit(&ac,av);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week14 timer");
glutTimerFunc(3000,timer,0);
glutDisplayFunc(display);
glutMainLoop();
}
3-3. Coding (Add sound)
Code:#include <GL/glut.h>
#include <mmsystem.h>
#include <stdio.h>
void timer(int t){ ///t單位ms
printf("鬧鐘%d,我起床了\n設定下個鬧鐘\n",t);
PlaySound("do.wav",NULL,SND_ASYNC);
printf("設好鬧鐘,再睡回去\n");
glutTimerFunc(2000,timer,t+1);
}
void display(){
}
int main(int ac,char**av){
glutInit(&ac,av);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week14 timer");
glutTimerFunc(3000,timer,0);
glutDisplayFunc(display);
glutMainLoop();
}
3-4. Put the file of sound in work file
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