编译原理——删除注释

 在学 编译原理，写了个删除注释的小程序

#include "stdio.h"
#include "string.h"
void main()
...{
        FILE *fIn,*fTemp,*fOut;
        char ch1,ch2,buffer[100];
        int i,len;
        printf("___________________________________________________ ");
        printf("*************************************************** ");
        printf(" 这是一个用于删除C语言源程序中注释的小程序！ ");
        printf(" Made by zs,on Mar 27th,2008. ");
        printf("*************************************************** ");
        printf("___________________________________________________ ");
        
        //删除'//'型注释
        if((fIn=fopen("input.txt","r"))==NULL)
        ...{
            printf("can not open this file! ");
        }
        fTemp=fopen("tempoutput.txt","w");
    
        while (!feof(fIn))
        ...{
            i=0;
            fgets(buffer,100,fIn);
            len=strlen(buffer);
            while(len--)
            ...{
                ch1=buffer[i];
                ch2=buffer[i+1];
                i++;
                if (ch1=='/'&&ch2=='/')
                ...{
                    fputc(' ',fTemp);
                    break;
                }
                fputc(ch1,fTemp);
            }
        }
        fclose(fIn);
        fclose(fTemp);
    
        //删除'/**/'型注释
        if((fTemp=fopen("tempoutput.txt","r"))==NULL)
        ...{
                printf("can not open this file! ");
        }
        fOut=fopen("output.txt","w");

        while ((ch1 = fgetc(fTemp)) != EOF)
        ...{        
            if (ch1== '/')
            ...{   
                ch2= fgetc(fTemp);
                if (ch2 == '*')
                    ...{
                        ch1= fgetc(fTemp);
                        ch2= fgetc(fTemp);
                        while (ch1 != '*' &&ch2 != '/')
                        ...{
                            ch1=ch2;
                            ch2=fgetc(fTemp);
                        
                        }
                    }
                else
                    ...{
                        fputc(ch1,fOut);
                        fputc(ch2,fOut);
                    }    
            }    
            else
                fputc(ch1,fOut);
        
        }
       fclose(fTemp);
       fclose(fOut);
}