#include<stdio.h>
#include<ctype.h>
#include<stdbool.h>
#include<stdlib.h>
#include<unistd.h>
int main(int argc,char *argv[])
{
	char ch;
	int choice;
	
	FILE *fp;
	unsigned long lines=1;//行数 
	unsigned long count=0;//字符数
	int n_words=0;//单词数
	bool inword=false;//一个flag，如果c在单词中，inword等于true

    unsigned long cd_lines=0;//代码行数 
	unsigned long e_rows=0;//空行数 
	unsigned long cm_lines=0;//注释行数 
	
	while((choice=getopt(argc,argv,"c::w::l::a"))!=-1){
		switch(choice){
		
		case 'c':{
		
		if(argc!=3){
		printf("Usage: %s filename\n",argv[0]);
		exit(EXIT_FAILURE);}
	    if((fp=fopen(argv[2],"r"))==NULL)
	{
		printf("Can't open %s\n",argv[2]);
	    exit(EXIT_FAILURE);
	}
	while((ch=getc(fp))!=EOF)
	{
		count++;
	}
	fclose(fp);
	printf("File %s has %lu characters\n",argv[2],count);

	break;
	} 
			
		case 'w':{ 
		if(argc!=3){
		printf("Usage: %s filename\n",argv[0]);
		exit(EXIT_FAILURE);
	}
	
	if((fp=fopen(argv[2],"r"))==NULL){
		printf("Can't open %s\n",argv[2]);
		exit(EXIT_FAILURE);
	}
	
	while((ch=getc(fp))!=EOF){
		
		if(!isspace(ch)&&!ispunct(ch)&&!inword){//若c不为空格，不为标点符号，不在单词中
			inword=true;
			n_words++;
		}
		if(inword&&(isspace(ch)||ispunct(ch)))//若c不在单词中，是空格或者标点符号
		   inword=false;
}
    fclose(fp);
	printf("File %s has %d words\n",argv[2],n_words);
				break;
	}		
			
		case 'l':{ 
			if(argc!=3){
		printf("Usage: %s filename\n",argv[0]);
		exit(EXIT_FAILURE);
	}
	if((fp=fopen(argv[2],"r"))==NULL)
	{
		printf("Can't open %s\n",argv[2]);
	    exit(EXIT_FAILURE);
	}

	 while((ch=getc(fp))!=EOF)
	{
	 if(ch=='\n'||ch=='\0')lines++;
	}
	
	fclose(fp);
	printf("File %s has %lu lines\n",argv[2],lines);	
			
	break;
	} 
	
/*	case 'a':{
		if(argc!=3){
		printf("Usage: %s filename\n",argv[0]);
		exit(EXIT_FAILURE);
	}
	
	    if((fp=fopen(argv[2],"r"))==NULL){
		printf("Can't open %s\n",argv[2]);
		exit(EXIT_FAILURE);
	}
	//方法一  
    char arr[100];
    ch=getc(fp);
   
	while (ch!= EOF){
		if(ch=='\n'){
			int i=0;
			ch=getc(fp);
			while(ch!='\n'){
			arr[i]=ch;
			i++;
			}
			if(strlen(arr)<2)e_rows++;
		}
		else if(ch=='{'||ch=='}'){
			ch=getc(fp);
			if(ch=='\n')e_rows++;
		}
			
        else {
        	cd_lines++;
        	while (ch != '{'&&ch != '}'&&ch != '\n'&&ch != '/'&&ch != EOF)
            {
                ch = getc(fp);
            }
		}
	}//空格不会弄 
	
	//方法二 代码行与空行的判断 
        char st[100];
	    while(!feof(fp)){
    	int show_char=0; 
    	int i=0;
    	if(fgets(st,sizeof(st),fp)){
    		for(i=0;i<strlen(st);i++)
    	{
    		if(st[0]=='\n'){
    			e_rows++;
    			break;
			}
			else if(st[i]=='\0'||(st[i]=='{'&&st[i+1]=='\0')||(st[i]=='}'&&st[i+1]=='\0')){
				e_rows++;
				break;
			}
			
		}
		}
		else if (ch == '/')
        {
            ch = getc(fp);
            if (ch == '/')
            while (ch != '\n')
            {
                ch = getc(fp);
            }
            cm_lines++;
            ch = getc(fp);
        }
	}
		
	}*/
	
	return 0;	
}
}
}