C语言-编程实例-合并文档程式

/*** 文档合并 ***/

/***
运行程式时，假如编绎成的可执行文档名为fadd.exe
则 命令行：例如 fadd file#nnn
主意：输入" file#nnn " ，而不是 " file#nnn.001 " ***/
/*** 当分快文档少于 32 块时，能够不用此程式，
直接运行分割时生成的披拷贝文档即可 ***/

#include<sio.h>
main(int argc,char **argv)
{
FILE *fp_read,*fp_write;
int buffer=0,i,len,pc_fn=1;
char *fn_in,fn_out[50],*p=".001",ch='#';
if (argc==1)
{
printf ("\n ERROR! you fogot enter the file name ( file#nnn )\n");
exit (0);
}
fn_in=argv[1];
i=0; /*** file#nnn ---> file.nnn 得到目标文档名 ***/
while (*(fn_in i))
{
if (*(fn_in i)=='#') *(fn_out i)='.'; else *(fn_out i)=*(fn_in i); i ;
}
*(fn_out i)='\0';
scat (fn_in,p); len=slen (fn_in); /*** file#nnn ---> file#nnn.01 ***/
if ((fp_read=fopen (fn_in,"rb"))==NULL) /*** 检测块文档是否存在***/
{ printf ("\n ERROR! the file \" %s \" not exsits\n",fn_in); exit (0); }

/*** 检测目标文档是否已存在。假如存在，交出"控制权" ***/

if ((fp_write=fopen(fn_out,"rb"))!=NULL)
{
fclose (fp_write);
printf ("\n OVERWRITE the file \" %s \" (Y/N)?",fn_out);
while (ch!='N'&&ch!='n'&&ch!='Y'&&ch!='y')
{
ch=getche();
if (ch=='Y'||ch=='y') break;
if (ch=='N'||ch=='n') { printf ("\n"); exit (0); }
}
printf ("\n");
}

/*** 合并 ***/ /*** 第一个块文档已在前面检测时打开 ***/

fp_write=fopen(fn_out,"wb"); /*** 建立目标文档 ***/
while (fp_read) /*** 块文档不能被打开 （不存在 ） 时，停下 ***/
{
fread (&buffer,1,1,fp_read);
while (!feof(fp_read))
{
fwrite (&buffer,1,1,fp_write); fread (&buffer,1,1,fp_read);
}
fclose (fp_read);
pc_fn ;
if (pc_fn==0&&pc_fn0!=0)
{ *(fn_in len-2) =1; *(fn_in len-1)-=9; }
else if (pc_fn0!=0) *(fn_in len-1) =1;
if (pc_fn0==0) { *(fn_in len-3) =1; *(fn_in len-2)-=9; *(fn_in len-1)-=9; }
fp_read=fopen(fn_in,"rb");
}
fclose (fp_read); fclose (fp_write);
printf ("\n OK! the file \" %s \" be created successfuly\n",fn_out);
printf ("\n %d files been added\n",pc_fn-1);
}