algo3-3.cpp

 // algo3-3.cpp 行编辑程序，实现算法3.2
 typedef char SElemType; 
 #include"c1.h"
 #include"c3-1.h" 
 #include"bo3-1.cpp" 
 FILE *fp;

 void copy(SElemType c)
 { 
   fputc(c,fp);
 }

 void LineEdit()
 { 
   SqStack s;
   char ch;
   InitStack(s); 
   printf("请输入一个文本文件，^Z结束输入：\n");
   ch=getchar(); 
   while(ch!=EOF) 
   { while(ch!=EOF&&ch!='\n') 
     { switch(ch) 
       { case '#':if(!StackEmpty(s))
                    Pop(s,ch); 
                  break;
         case '@':ClearStack(s); 
                  break;
         default :Push(s,ch); 
       }
       ch=getchar(); 
     } 
     StackTraverse(s,copy); 
     fputc('\n',fp); 
     ClearStack(s); 
     if(ch!=EOF) 
       ch=getchar(); 
   }
   DestroyStack(s); 
 }

 void main()
 {
   fp=fopen("ed.txt","w");
   
   if(fp) 
   { LineEdit(); 
     fclose(fp); 
   }
   else
     printf("建立文件失败！\n");
 }