Week12-1
寫檔案
#include <stdio.h>
int main()
{
FILE * fout = fopen("file.txt", "w");///w代表write
printf("Hellow World\n");
fprintf(fout, "Hellow World在檔案裡\n");
}
寫一個.txt的檔案
檔案文字&小黑視窗
Week12-2
讀檔案
#include <stdio.h>
int main()
{
FILE * fin = fopen("file.txt", "r");///r代表read
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);
}
讀剛剛寫的.txt檔案
分開讀檔案文字
Week12-3
寫檔案並讀取
#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, b[i]);
}
fclose(fin);
}
輸出file3.txt再讀取file3.txt
檔案文字&讀文字檔的小黑視窗
W12-4
滑鼠控制位置
#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 = -(y-150)/150.0;
}
display();
}
int main(int argc, char* argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week12");
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMainLoop();
}
茶壺移動至滑鼠點擊位置
點擊移動茶壺
茶壺移動至滑鼠點擊位置並且記錄，按空白建讓茶壺移動至早前點擊位置
FILE * fout = NULL;
FILE * fin = NULL;
void mouse(int button,int state,int x,int y)
{
if(state==GLUT_DOWN)
{
teapotX = (x-150)/150.0;
teapotY = (150-y)/150.0;
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();
}
預設儲存位置、檔案紀錄
更改file4.txt儲存位置
更改設定
複製freeglut.dll
更改設定
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