POJ 1488 TEX Quotes(내 워터프루프-폭수, 문자 변환)
Time Limit: 1000MS
Memory Limit: 10000K
Total Submissions: 6837
Accepted: 3593
Description
TEX is a typesetting language developed by Donald Knuth. It takes source text together with a few typesetting instructions and produces, one hopes, a beautiful document. Beautiful documents use double-left-quote and double-right-quote to delimit quotations, rather than the mundane "which is what is provided by most keyboards. Keyboards typically do not have an oriented double-quote, but they do have a left-single-quote ` and a right-single-quote '. Check your keyboard now to locate the left-single-quote key ` (sometimes called the "backquote key") and the right-single-quote key ' (sometimes called the "apostrophe"or just "quote"). Be careful not to confuse the left-single-quote ` with the "backslash"key\. TEX lets the user type two left-single-quotes `` to create a left-double-quote and two right-single-quotes '' to create a right-double-quote. Most typists, however, are accustomed to delimiting their quotations with the un-oriented double-quote ".
If the source contained
"To be or not to be,"quoth the bard, "that is the question."
then the typeset document produced by TEX would not contain the desired form: "To be or not to be,"quoth the bard, "that is the question."In order to produce the desired form, the source file must contain the sequence:
``To be or not to be,'' quoth the bard, ``that is the question.''
You are to write a program which converts text containing double-quote (") characters into text that is identical except that double-quotes have been replaced by the two-character sequences required by TEX for delimiting quotations with oriented double-quotes. The double-quote (") characters should be replaced appropriately by either `` if the "opens a quotation and by '' if the "closes a quotation. Notice that the question of nested quotations does not arise: The first "must be replaced by ``, the next by '', the next by ``, the next by '', the next by ``, the next by '', and so on.
Input
Input will consist of several lines of text containing an even number of double-quote (") characters. Input is ended with an end-of-file character.
Output
The text must be output exactly as it was input except that:
Sample Input
"To be or not to be," quoth the Bard, "that
is the question".
The programming contestant replied: "I must disagree.
To `C' or not to `C', that is The Question!"
Sample Output
``To be or not to be,'' quoth the Bard, ``that
is the question''.
The programming contestant replied: ``I must disagree.
To `C' or not to `C', that is The Question!''
Source
East Central North America 1994
첫 번째 큰따옴표 ""을 (를) ""로 변환하면 ""로 변환하는 명문을 보여 줍니다.
"", 두 번째 큰따옴표는 ""로 변환됩니다.
단일 문자를 읽어들여서 ""인지 여부를 판단하고 표시 변수를 사용하여 첫 번째인지 두 번째인지 판정합니다.
코드(1AC):
#include <cstdio>
#include <cstdlib>
int main(void){
char ch;
int flag = 1;
while ((ch = getchar()) != EOF ){
if (ch == '"'){
flag ? printf("``") : printf("''");
flag = 1 - flag;
}
else{
putchar(ch);
}
}
return 0;
}
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