1.開檔、寫檔、關檔
`fopen()`需先指標
-`FILE * fin = fopen("file.txt", "w+");`
--w+:write+順便新增
程式碼如下
#include <stdio.h>
int main()
{
FILE * fout = fopen("file.txt", "w+");
printf("Hello World\n");
fprintf(fout, "Hello World\n");
fclose(fout);
}
執行後存放的地方會跑出一個TXT檔
1-2.
開檔、讀檔、關檔
程式碼如下
#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("讀到了字串:%s 及整數%d\n", line, a);
fclose(fin);
}
2.開一個GLUT專案
貼上上禮拜的TRT選轉檔案 加上下列程式碼
void myWrite(){
if(fout==NULL) fout = fopen("file.txt","w+");
for(int i=0; i<20; i++){
fprintf(fout,"%.2f ",angle[i]);
}
}
完整程式碼如下
#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++){
fprintf(fout,"%.2f ",angle[i]);
}
}
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)///mouse按下去
{
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);
glRectf(0.3, 0.5, -0.3, -0.2);///四邊形Rectangle，表白色身體
glPushMatrix();
glTranslatef(0.3, 0.5, 0);///等下要掛到0.5,0.5
glRotatef(angle[0], 0, 0, 1);///Z軸，(2)旋轉45度
glTranslatef(-0.3, -0.4, 0);///(1)把旋轉中心放到正中心
glColor3f(1, 0, 0);
glRectf(0.3, 0.5, 0.8, 0.3);///畫手臂
glPushMatrix();
glTranslatef(0.8, 0.4, 0);///(3)把下手肘掛在關節上
glRotatef(angle[1], 0, 0, 1);///(2)旋轉
glTranslatef(-0.8, -0.4, 0 );///(1)把下手肘的旋轉中心，放正中心
glColor3f(0,1,0);
glRectf(0.8, 0.5, 1.1, 0.3);///畫下手肘
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.3, 0.5, 0);///等下要掛到0.5,0.5
glRotatef(angle[2], 0, 0, 1);///Z軸，(2)旋轉45度
glTranslatef(0.3, -0.4, 0);///(1)把旋轉中心放到正中心
glColor3f(1, 0, 0);
glRectf(-0.3, 0.5, -0.8, 0.3);///畫手臂
glPushMatrix();
glTranslatef(-0.8, 0.4, 0);///(3)把下手肘掛在關節上
glRotatef(angle[3], 0, 0, 1);///(2)旋轉
glTranslatef(0.8, -0.4, 0 );///(1)把下手肘的旋轉中心，放正中心
glColor3f(0,1,0);
glRectf(-0.8, 0.5, -1.1, 0.3);///畫下手肘
glPopMatrix();
glPopMatrix();
glutSwapBuffers();///2被交換的buffer
}
int main(int argc,char ** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(600,600);
glutCreateWindow("Week14 TRT angle write");
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutDisplayFunc(display);
glutMainLoop();
}
2-1
#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)///mouse按下去
{
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);
glRectf(0.3, 0.5, -0.3, -0.2);///四邊形Rectangle，表白色身體
glPushMatrix();
glTranslatef(0.3, 0.5, 0);///等下要掛到0.5,0.5
glRotatef(angle[0], 0, 0, 1);///Z軸，(2)旋轉45度
glTranslatef(-0.3, -0.4, 0);///(1)把旋轉中心放到正中心
glColor3f(1, 0, 0);
glRectf(0.3, 0.5, 0.8, 0.3);///畫手臂
glPushMatrix();
glTranslatef(0.8, 0.4, 0);///(3)把下手肘掛在關節上
glRotatef(angle[1], 0, 0, 1);///(2)旋轉
glTranslatef(-0.8, -0.4, 0 );///(1)把下手肘的旋轉中心，放正中心
glColor3f(0,1,0);
glRectf(0.8, 0.5, 1.1, 0.3);///畫下手肘
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.3, 0.5, 0);///等下要掛到0.5,0.5
glRotatef(angle[2], 0, 0, 1);///Z軸，(2)旋轉45度
glTranslatef(0.3, -0.4, 0);///(1)把旋轉中心放到正中心
glColor3f(1, 0, 0);
glRectf(-0.3, 0.5, -0.8, 0.3);///畫手臂
glPushMatrix();
glTranslatef(-0.8, 0.4, 0);///(3)把下手肘掛在關節上
glRotatef(angle[3], 0, 0, 1);///(2)旋轉
glTranslatef(0.8, -0.4, 0 );///(1)把下手肘的旋轉中心，放正中心
glColor3f(0,1,0);
glRectf(-0.8, 0.5, -1.1, 0.3);///畫下手肘
glPopMatrix();
glPopMatrix();
glutSwapBuffers();///2被交換的buffer
}
int main(int argc,char ** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(600,600);
glutCreateWindow("Week14 TRT angle write");
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutDisplayFunc(display);
glutMainLoop();
}
2-2
使用notepad++更改工作目錄
3.TIMER
#include <GL/glut.h>
#include <stdio.h>
void timer (int t)
{ ///1000代表1秒，1500代表1.5秒
printf("鬧鐘%d, 我起床了\n", t);///起床做事
printf("設定下一個鬧鐘\n");
glutTimerFunc(1000, timer, t+1);
printf("設好鬧鐘再回去睡\n");
}
void display()
{
}
int main(int argc, char**argv)
{///進階的main函式
glutInit( &argc, argv);///初始化
glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH);///兩倍交換避免畫面閃爍+3D深度
// glutInitWindowSize(600, 600);
glutCreateWindow("week13_Rectangle");///建視窗
glutTimerFunc(3000, timer, 0);
glutDisplayFunc( display );///畫圖函式
glutMainLoop();///主要迴圈
}
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