t22.c

来自「ALL LINUX LAB PROGRAM MIT MANIPAL 2008-0」· C语言 代码 · 共 50 行

#include<stdio.h>
#include<fcntl.h>
main()
{
	int fd1,fd2,count=0;
	char c,fname1[20],fname2[20];
	printf("\n Enter a  name of exixting file  :");
	scanf("%s",fname1);
	printf("\n enter filename to create :");
	scanf("%s",fname2);
	fd1=open(fname1,0);
	if(fd1<0)
		printf("\n File does not exits");
	else
	{
		fd2=creat(fname2,0764);
		if(fd2<0)
			printf("\n File cannot be cearted");
		else
		{
			fd2=open(fname2,1);
			while((read(fd1,&c,1))!=0)
			
				write(fd2,&c,1);
		}
		close(fd1);
		close(fd2);
		fd2=open(fname2,0);
		if(fd2<0)
			printf("\n Cannot open file");
		else
		{
			while((read(fd2,&c,1))!=0)
			{
				putchar(c);
				count++;
			}
			printf("\n No. of cahracter in a file : %d",count);
			
		}
	}
}