t23.c

来自「ALL LINUX LAB PROGRAM MIT MANIPAL 2008-0」· C语言 代码 · 共 37 行

#include<stdio.h>
#include<fcntl.h>
main()
{
	int fd,pos,count=0,f=0;
	char c,fname[20];
	printf("\n Enter a exixting fila name :");
	scanf("%s",fname);
	printf("\n Enter the position :");
	scanf("%d",&pos);
	fd=open(fname,0);
	if(fd<0)
		printf("\n File cannot open");
	else
	{
		while((read(fd,&c,1))!=0)
			putchar(c);
		close(fd);
		fd=open(fname,0);
		while((read(fd,&c,1))!=0)
		{
			
			count++;
			if(count>=pos)
			{
				f=1;
				putchar(c);
			}
		}
		if(f!=1)
			printf("invalid postion ");
		close(fd);
	}
}