The number of times the Linux implementation has appeared for the text statistic letters (all printable characters)

Source: Internet
Author: User
Tags printable characters

Recently looking at interesting programming, found that the algorithm is really a good thing, hehe, I also wrote a simple demo

The code is specific as follows:

#include <stdio.h>#include<string.h>#include<unistd.h>#include<stdint.h>#include<fcntl.h>#include<sys/types.h>#include<sys/stat.h>#defineBsize 255#defineBufSize 4096Staticuint64_t arr[255] ={0};Staticuint64_t hash =0;voidWhash (Char*s) {    intLen =strlen (s); inti =0, total =0;  while(I <Len) {        intindex = s[i]- +; if(Hash & (1<<index)) = =0) {Hash|= (1<<index); Arr[index]++; } Else{Arr[index]++; } I++; }}intBreadChar*file) {    intFD = open (File,o_rdonly,0666); structStat St; CharBuf[bufsize] = {' /'}; if(FD = =-1) {        return-1; } fstat (FD,&St); size_t Total=st.st_size;  while(Total >0) {        intleft =read (fd,buf,bufsize); if(Left <0) {             Break;        } whash (BUF); Total-=Left ; memset (BUF,' /', bufSize); }    return 0;}intMainvoid) {printf ("bread =%d\n", Bread ("./SRY.C")); inti =0;  for(; I < bsize;i++) {        if(Arr[i] >0) {printf ("count (%c) =%d\n", i+ +, Arr[i]); }    }    return 0;}

The results of the operation are as follows:

[Email protected]:~/code_c_20160101/algorithm/str:./Srybread=0count ()=335Count (") =6Count (#) =9Count (%) =3Count (&) =2Count (') =4Count (() = atcount ())= atCount (*) =2Count (+) =9count (,)= OneCount (-) =4count (.)=TenCount (/) =3Count (0) = theCount (1) =4Count (2) =4Count (3) =2Count (4) =3Count (5) =4Count (6) =6Count (9) =1count (;)= -Count (<) = -Count (=) = +Count (>) =9count (D)=1count (L)=1count (N)=1count (O)=2count (R)=1count (S)=6count (Y)=1count ([)=7count (\)=4count (])=7count (_)=5Count (a)= -count (b)= -count (c)= -count (d)= incount (e)= -count (f)= -count (g)=1count (h)= Acount (i)= Acount (k)=1count (L)= atcount (m)=3count (N)= Acount (o)=Tencount (p)=4count (R)= tocount (s)= -count (t)= -count (U)= atcount (v)=2Count (W)=4count (x)=5count (y)=4count (z)=8count ({)= -Count (|) =1count (})= -

The number of times the Linux implementation has appeared for the text statistic letters (all printable characters)

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.