单词排序.c

对文件的操作题 包括文件重排 文件加密等等小程序

#include <stdio.h>
#include <string.h>
main()
{
	FILE *in,*out;
	char c,s[100][50]={0},a[100]={0};
	int i=0,j=0,k;
	in=fopen("sort.in","r");
	out=fopen("sort.out","w");
	c=fgetc(in);
	while(c!=EOF)
	{
		while((c>'z'||c<'a')&&c!=EOF)
			c=fgetc(in);
		while(c>='a'&&c<='z'&&c!=EOF)
		{
			s[i][j]=c;
			c=fgetc(in);
			j++;
		}
		i++;
		j=0;
	}
	for(k=0;k<i;k++)
	{
		for(j=0;j<i-k-1;j++)
		{
			if(strcmp(s[j],s[j+1])>0)
			{
				strcpy(a,s[j]);
				strcpy(s[j],s[j+1]);
				strcpy(s[j+1],a);
			}
		}
	}
	fprintf(out,"%s ",s[0]);
	for(k=0;k<i-1;k++)
		if(strcmp(s[k],s[k+1])!=0)
			fprintf(out,"%s ",s[k+1]);
   fclose(in);
   fclose(out);
}