#include <stdio.h>
#define COPY 0
#define START 1
#define COMMENT 2
#define END 3
void main (void)
{
   char c;
   int state=COPY;
   printf("please input a text end of Ctrl+z:\n");
   while((c=getchar())!=EOF)
    {
      switch(state)
      case COPY: if(c=='/') state=START;
                  else putchar(c);
                  break;
      case START:
                    if(c=='*') state=COMMENT;
                    else {
                    putchar('/');
                    state=(c=='/')?START:(putchar(c),COPY);
                                             }
                                                break;
      case COMMENT:
                    if(c=='*') state=END;
                    break;
      case END: if(c=='/') state=COPY;
                else c=='*'?state=END:state=COMMENT;


    }

}

这个程序错在哪里了？

两个黄鹂鸣翠柳,一行白鹭上青天.

switch()后面应该要加{}！

#include <stdio.h>
#define COPY 0
#define START 1
#define COMMENT 2
#define END 3
void main (void)
{
   char c;
   int state=COPY;
   printf("please input a text end of Ctrl+z:\n");
   while((c=getchar())!=EOF)
    {
      switch(state)
      {
      case COPY: if(c=='/') state=START;
                  else putchar(c);
                  break;
      case START:
                    if(c=='*') state=COMMENT;
                    else {
                    putchar('/');
                    state=(c=='/')?START:(putchar(c),COPY);
                                             }
                                                break;
      case COMMENT:
                    if(c=='*') state=END;
                    break;
      case END: if(c=='0') state=COPY;
                else c==(state==END||state==COMMENT);
      }

    }

}