Automatic Editing（字符串替换）

Automatic Editing

Time Limit:3000MS     Memory Limit:0KB     64bit IO Format:%lld & %llu

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Description

Problem E: Automatic Editing

Source file:autoedit.{c, cpp, java, pas}Input file:autoedit.inOutput file:autoedit.out

Text-processing tools like awk and sed allow you to automatically perform a sequence of editing operations based on a script. For this problem we consider the specific case in which we want to perform a series of string replacements, within a single line of text, based on a fixed set of rules. Each rule specifies the string to find, and the string to replace it with, as shown below.

RuleFindReplace-by1.banbab2.bababe3.anaany4.ba bhind the g

To perform the edits for a given line of text, start with the first rule. Replace the first occurrence of the find string within the text by thereplace-by string, then try to perform the same replacement again on the new text. Continue until the find string no longer occurs within the text, and then move on to the next rule. Continue until all the rules have been considered. Note that (1) when searching for a findstring, you always start searching at the beginning of the text, (2) once you have finished using a rule (because the find string no longer occurs) you never use that rule again, and (3) case is significant.

For example, suppose we start with the line

banana boat

and apply these rules. The sequence of transformations is shown below, where occurrences of a find string are underlined and replacements are boldfaced. Note that rule 1 was used twice, then rule 2 was used once, then rule 3 was used zero times, and then rule 4 was used once.

 BeforeAfterbanana boatbabana boatbabana boatbababa boatbababa boatbeba boatbeba boatbehind the goat

The input contains one or more test cases, followed by a line containing only 0 (zero) that signals the end of the file. Each test case begins with a line containing the number of rules, which will be between 1 and 10. Each rule is specified by a pair of lines, where the first line is the find string and the second line is the replace-by string. Following all the rules is a line containing the text to edit. For each test case, output a line containing the final edited text.

Both find and replace-by strings will be at most 80 characters long. Find strings will contain at least one character, but replace-bystrings may be empty (indicated in the input file by an empty line). During the edit process the text may grow as large as 255 characters, but the final output text will be less than 80 characters long.

The first test case in the sample input below corresponds to the example shown above.

Example input:

4banbabbababeanaanyba bhind the gbanana boat1tshtoe or top0

Example output:

behind the goatshoe or shop

给你n对字符串，在给你一句话，用每对字符串分别去替换

#include <cstdio>#include <cstring>#include <iostream>using namespace std;int main(){    char zhao[100][300],huan[100][300];    int n;    while(cin>>n)    {        if(!n)            break;        getchar();        for(int i=0; i<n; i++)        {            gets(zhao[i]);            gets(huan[i]);        }        char s[11001];        char c[11000];        //getchar();        gets(s);        for(int i=0; i<n; i++)        {            char *a,*b;            if(strstr(s,zhao[i]))                 {                a=strstr(s,zhao[i]);     //找到要换的地址                b= a + strlen(zhao[i]);  //b是要替换的字符串后面的串的首地址                *a='\0';                //将s从要替换的字符串前断开                          strcpy(c,b);                            strcat(s,huan[i]);      //分别连接后面的两部分（用来替换的串 和 被替换的串后面的串）                strcat(s,c);                i--;            }        }        cout<<s<<endl;    }    return 0;}