作者: momoff2011
2013-02-28 10:03:14
教程上上的一个例子
/*write.c*/
#include
#include
#include
#include
#include
#include
#include
#define MAXSIZE
int main(void)
{
int i,fd,size,len;
char *buf="Hello! I'm writing to this file!";
char buf_r[10];
len = strlen(buf);
if((fd = open("/tmp/hello.c", O_CREAT | O_TRUNC | O_RDWR,0666 ))<0){
perror("open:");
exit(1);
}
else
printf("open file:hello.c %d\n",fd);
if((size = write( fd, buf, len)) < 0){
perror("write:");
exit(1);
}
else
printf("Write:%s\n",buf);
lseek( fd, 0, SEEK_SET );
if((size = read( fd, buf_r, 10))<0){
perror("read:");
exit(1);
}
else
printf("read form file:%s\n",buf_r);
if( close(fd) < 0 ){
perror("close:");
exit(1);
}
else
printf("Close hello.c\n");
exit(0);
}
我的运行结果是在size = read( fd, buf_r, 10))<0 出错了 read 函数不是这样写的吗？