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(HDUStep 1.2.5)The Seven Percent Solution(字符串的替换)

2024-11-19 05:38:39   202人阅读

题目：

The Seven Percent Solution

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 2637 Accepted Submission(s): 1562
 
Problem Description
Uniform Resource Identifiers (or URIs) are strings like http://icpc.baylor.edu/icpc/, mailto:foo@bar.org, ftp://127.0.0.1/pub/linux, or even just readme.txt that are used to identify a resource, usually on the Internet or a local computer. Certain characters are reserved within URIs, and if a reserved character is part of an identifier then it must be percent-encoded by replacing it with a percent sign followed by two hexadecimal digits representing the ASCII code of the character. A table of seven reserved characters and their encodings is shown below. Your job is to write a program that can percent-encode a string of characters.

Character  Encoding
" " (space)  %20
"!" (exclamation point)  %21
"$" (dollar sign)  %24
"%" (percent sign)  %25
"(" (left parenthesis)  %28
")" (right parenthesis)  %29
"*" (asterisk)  %2a
 
Input
The input consists of one or more strings, each 1–79 characters long and on a line by itself, followed by a line containing only "#" that signals the end of the input. The character "#" is used only as an end-of-input marker and will not appear anywhere else in the input. A string may contain spaces, but not at the beginning or end of the string, and there will never be two or more consecutive spaces.
 
Output
For each input string, replace every occurrence of a reserved character in the table above by its percent-encoding, exactly as shown, and output the resulting string on a line by itself. Note that the percent-encoding for an asterisk is %2a (with a lowercase "a") rather than %2A (with an uppercase "A").
 
Sample Input
Happy Joy Joy!
http://icpc.baylor.edu/icpc/
plain_vanilla
(**)
?
the 7% solution
#
 
Sample Output
Happy%20Joy%20Joy%21
http://icpc.baylor.edu/icpc/
plain_vanilla
%28%2a%2a%29
?
the%207%25%20solution
 
 
Source
Mid-Central USA 2007
 
Recommend
teddy
 



题目分析：

     按要求将字符串换成指定的字符串即可。因为用java比较快。所以使用java来实现



代码如下：

import java.util.Scanner;


public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		while(scanner.hasNext()){
			String str = scanner.nextLine();
			
			if(str.equals("#")){
				return ;
			}
			
			str = str.replace("%", "%25");//因为替换的结果有%,所以把%的替换放在前面
			str = str.replace(" ", "%20");
			str = str.replace("!", "%21");
			str = str.replace("$", "%24");
			str = str.replace("(", "%28");
			str = str.replace(")", "%29");
			str = str.replace("*", "%2a");
			
			
			System.out.println(str);
		}
	}
}


    



(HDUStep 1.2.5)The Seven Percent Solution(字符串的替换)


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