让C语言编辑更轻松的小程序（加上了对文件是否有内容的判断和自定义文件名)

#include
#include
#include
#include
#include
#include
int main(int argc,char *argv[])
{
 int fd;
 if((fd=open(argv[1],O_CREAT|O_APPEND|O_RDWR,700))==-1)
 {
  perror("open");
  exit(1);
 }
 else
 {
  printf("OK!");
 }

 char *p[]={"# include \n","# include <>\n","int main () \n","{\n","\n\n\n","}\n"};
 int i,len,size;
 
 char buf[256];
 
 lseek(fd, SEEK_SET, 0);
 int ret = read(fd, buf, 256);
 printf("%d\n", ret);
 if(ret==0)   //如果文件内容为0 就写入
 {
  for(i=0;i<6;i++)
  {
   len=strlen(p[i]);
 
   if((size=write(fd,p[i],len))<0)
   {
    perror("write");
    exit(1);
   } 
  }
  close(fd);
 } 
 else
 printf("Document non-spatial\n"); 
}