The Seven Percent Solution

The Seven Percent Solution

时间： 1ms        内存：64M

描述：

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

输入：

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.

输出：

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").

示例输入：

Happy Joy Joy!
http://icpc.baylor.edu/icpc/
plain_vanilla
(**)
?
the 7% solution
#

示例输出：

Happy%20Joy%20Joy%21
http://icpc.baylor.edu/icpc/
plain_vanilla
%28%2a%2a%29
?
the%207%25%20solution

提示：

参考答案（内存最优[752]）：

#include<stdio.h>
#include<string.h>
char s[1000];

int main()
{
    int i,len;
    while(gets(s))
    {
        len=strlen(s);
        if(s[0]=='#')
            break;
        for(i=0;i<len;i++)
        {
            if(s[i]==' ')
                printf("%%20");
            else if(s[i]=='!')
                printf("%%21");
            else if(s[i]=='$')
                printf("%%24");
            else if(s[i]=='%')
                printf("%%25");
            else if(s[i]=='(')
                printf("%%28");
            else if(s[i]==')')
                printf("%%29");
            else if(s[i]=='*')
                printf("%%2a");
            else
                printf("%c",s[i]);
        }
        printf("\n");
    }
    return 0;
}

参考答案（时间最优[0]）：

#include<stdio.h>
#include<string.h>
char s[1000];

int main()
{
    int i,len;
    while(gets(s))
    {
        len=strlen(s);
        if(s[0]=='#')
            break;
        for(i=0;i<len;i++)
        {
            if(s[i]==' ')
                printf("%%20");
            else if(s[i]=='!')
                printf("%%21");
            else if(s[i]=='$')
                printf("%%24");
            else if(s[i]=='%')
                printf("%%25");
            else if(s[i]=='(')
                printf("%%28");
            else if(s[i]==')')
                printf("%%29");
            else if(s[i]=='*')
                printf("%%2a");
            else
                printf("%c",s[i]);
        }
        printf("\n");
    }
    return 0;
}

题目和答案均来自于互联网，仅供参考，如有问题请联系管理员修改或删除。