#include
ssize_t read(
int fd,
void *buf,
size_t count);
*buf:緩衝區,讀取的資料會被放到這個緩衝區中去
count:請求讀取的位元組數,讀上來的資料儲存在緩衝區buf中,同時檔案的當前讀寫位置向後移。
nread=read(fd,buff,
8);//讀串列埠
printf(
"nread=%d,%s\n",nread,buff);
nread=read(fd,buff,
8);//讀串列埠
printf(
"nread=%d,%s\n",nread,buff);
nread=read(fd,buff,
8);//讀串列埠
printf(
"nread=%d,%s\n",nread,buff);
printf
("nread=%d,%s\n"
,nread,buff);
while(
1)
#include
#include
intmain
(void)
write(stdout_fileno,buf,n);
return
0;
}
#include
ssize_t write(
int fd,
const
void *buf,
size_t count);
#include
intclose
(int fd)
;
nread=read(fd,buff,
8);//讀串列埠
printf(
"nread=%d,%s\n",nread,buff);
nread=read(fd,buff,
8);//讀串列埠
printf(
"nread=%d,%s\n",nread,buff);
nread=read(fd,buff,
8);//讀串列埠
printf(
"nread=%d,%s\n",nread,buff);
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