第一節課
week12-1
codeblock開新檔案,打上程式碼,執行後桌面會出現一個file.txt檔會寫(Hello World在檔案裡)。
#include <stdio.h>
int main()
{
FILE*fout =fopen("file.txt","w");
printf("Hello World\n");
fprintf(fout,"Hello World在檔案裡\n");
}
會把剛剛的file.txt讀進來。
#include <stdio.h>
int main()
{
char line[20];
FILE*fin =fopen("file.txt","r");
fscanf(fin,"%s",line);
printf("讀到了:%s\n",line);
fscanf(fin,"%s",line);
printf("讀到了:%s\n",line);
}
week12-3
會透過字串另存成一個file3.txt檔,後透過程式把字串叫進來。
第二節課
week12-4_keyboard_mouse
寫程式碼讓茶壺透過滑鼠點擊來改變位置。
#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)
{
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();
}
#include <stdio.h>
#include <GL/glut.h>
float teapotX=0,teapotY=0;
FILE*fout=NULL;
FILE*fin=NULL;
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)
{
teapotX=(x-150)/150.0;
teapotY=(150-y)/150.0;
if(state==GLUT_DOWN){
if(fout==NULL) fout=fopen("file4.txt","w");
fprintf(fout,"%f %f\n",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_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week12");
glutDisplayFunc(display);
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMainLoop();
}
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