12306 of leaked data, quick search for data with wood and you, programming implementation example, 12306 of your

12306 of leaked data, quick search for data with wood and you, programming implementation example, 12306 of your

</pre><pre code_snippet_id="576257" snippet_file_name="blog_20150110_2_9643624" name="code" class="objc">

/*************************************** * ******************************** All Rights Reserved (C) 2015, Wu Yingqiang ** file name: BigData. c * File ID: none * Content Abstract: Used to show how to find the specified character in Big Data * Other Description: none * Current version: V1.0 * Author: Wu yingqiang * completion date: 20150109 ** modification record 1: // modification history, including modification date, version number, modifier, and modification content * modification date: 20150109 * version number: V1.0 * modifier: wu yingqiang * modification content: create *************************************** * *****************************/# define _ CRT_SECURE_NO_WARNINGS # include <stdio. h> # in Clude <stdlib. h> # include <string. h> # include <time. h> char gPath [200] = "E: \ 12306data .txt"; # define N 119153 char str [100] = {0 }; // The string char ** gPtr = NULL; // second-level pointer storage address of the first-level pointer array /***************************** **************************************** ** function description: obtain the number of rows in the file * input parameter: none * output parameter: none * return value: number of rows-1-failure * Other Description: No * modified date version number modifier modified content * optional *------------------------------------------------------------------------------------ -- * 20150109 V1.0 Wuyq create ********************************** * ***********************************/int GetLineNum () {int iFileSize = 0; FILE * pfr = fopen (gPath, "r"); if (pfr = NULL) {return-1 ;}else {int I = 0; while (! Feof (pfr) {char strbuffer [256] = {0}; fgets (strbuffer, 256, pfr); // read a row of I ++ ;} iFileSize = ftell (pfr); printf ("file size: % f M \ n", 1.0 * iFileSize/1024/1024); fclose (pfr ); // close the file return I ;}} /*************************************** * ******************************** function description: initialize and read the file content to the memory * input parameter: none * output parameter: none * return value: none * Other Description: No * modified date version number modifier modified content * Others *------------------------------------------------------------------------------- ------- * 20150109 V1.0 Wuyq create ********************************** * ***********************************/void Init () {gPtr = (char **) malloc (sizeof (char *) * N); // dynamically allocates a pointer array memset (gPtr, '\ 0', sizeof (char *) * N); FILE * pfr = fopen (gPath, "r"); if (pfr = NULL) {printf ("initialization failed \ n"); return ;} else {for (int I = 1; I <= N; I ++) {char strbuffer [512] = {0}; fgets (strbuffer, 512, pfr ); // read a row of int length = strlen (strbuffe R); // obtain the length if (length! = 0) {gPtr [I] = malloc (sizeof (char) * (length + 1); // allocate memory for each pointer if (gPtr [I] = NULL) {printf ("\ nfail");} strcpy (gPtr [I], strbuffer); // copy the string // printf ("\ n % s ", gPtr [I]); // print the result} fclose (pfr ); // close the file }}/********************************* * ************************************ Function Description: release memory * input parameter: none * output parameter: none * return value: none * Other Description: No * modified date version number modifier content *-------------------------------------------------------------------------------- ------ * 20150109 V1.0 Wuyq create ********************************** * ***********************************/void Free () {for (int I = 1; I <= N; I ++) {free (gPtr [I]) ;}} /*************************************** * ******************************** function description: search data * input parameter: string to be searched, Which is input by the user * output parameter: none * return value: none * Other Description: No * modified date version number modifier modified content * limit * 2015010 9 V1.0 Wuyq create ************************************ * *********************************/void Search (char * str) {for (int I = 1; I <= N; I ++) {if (gPtr [I]! = NULL) {char * p = strstr (gPtr [I], str); // query if (p! = NULL) {printf ("the string to be searched, in line % d \ n", I); // print the result printf ("% s \ n ", gPtr [I]) ;}}} /*************************************** * ******************************** function description: main function * input parameter: none * output parameter: none * return value: none * Other description: there is no * modification date version number modifier change content * required * 20150109 V1.0 Wuyq creation ************************ **************************************** * ******/void main () {printf ("Total % d lines \ n", GetLineNum (); Init (); printf ("loaded \ n"); time_t start, end; time (& start); printf ("Enter the data you want to Search for: \ n"); scanf ("% s", str); Search (str ); time (& end); printf ("\ n total time % d S \ n", (unsigned int) (end-start); Free (); printf ("memory released \ n"); system ("pause ");}

Improvement in the later stage: the problem of Chinese characters.