Mark-up
Mark-up languages are computer languages that assist in the formatting of text files. Special keywords are used to mark the text to allow control of fonts, page styles, paragraph styles, etc. TeX, troff, and HTML are examples of mark-up languages.| Mark-up |
Spell checking can be difficult to adapt to these special texts. In general, special processors or spell checkers must be created in order to accommodate mark-up languages. A special processor would recognize the mark-up language and strip it from the text so that the ``plain'' text could then be processed by a spell checker. For this problem, you are to write such a processor for a small mark-up language so that the output of your program will be the plain text without the mark-ups.
The mark-up language to consider is one which allows the modification of fonts within the text. Each markup command will be preceded by a
\ character. If the letter following the \ character is not a recognized command from the table below then the character following the \ is printed as part of the plain text. For instance, the mark-up \\ can be used to print a single \.b
- toggle bold font on/off (default state is off)
- toggle italics font on/off (default state is off)
- set font size; the s is immediately followed by an optional number; if the number is missing then the command will restore the previous size
- toggle processing of mark-ups on/off; if processing is toggled off then mark-ups are considered to be literal text (default state is on)
SPMamp& command can have a decimal point so 12, 9.5, 11., and .5 should all be recognized as valid numbers.Input and Output
The input file will be plain text containing mark-ups from the language above. At the start, processing of mark-ups should be on. The file should be processed until the end-of-file is encountered.Sample Input
\s18.\bMARKUP sample\b\s \*For bold statements use the \b command.\* If you wish to \iemphasize\i something use the \\i command. For titles use \s14BIG\s font sizes, 14 points usually works well. Remember that all of the commands toggle except for the \\s command.
Sample Output
MARKUP sample For bold statements use the \b command. If you wish to emphasize something use the \i command. For titles use BIG font sizes, 14 points usually works well. Remember that all of the commands toggle except for the \s command.
output
#include<stdio.h>
#include<cstring>
#include<string>
#define REP(i, b, n) for (int i = b; i < n; i++)
#define rep(i, n) REP(i, 0, n)
#define DBG 0
using namespace std;
bool markup;
string cmd;
string getCmd(int &cur){
if(DBG)printf("getcmd %d\n",cur);
if(cmd[cur]=='\\'){
if(!markup)
if(cur+1>=cmd.size()||cmd[cur+1]!='*'){cur+=1;return "\\";} //go one letter
else{markup=1,cur+=2;return "";}
if(cmd[cur+1]=='\\'){cur+=2;return "\\";}
else if(cmd[cur+1]=='b'||cmd[cur+1]=='i'){cur+=2;}
else if(cmd[cur+1]=='*'){cur+=2,markup=!markup;}
else if(cmd[cur+1]=='s'){
int c=cur+2;
bool pp=0;
while(c<cmd.size()&&isdigit(cmd[c]))c++;
if(c<cmd.size()&&cmd[c]=='.')pp=1,c++;
while(c<cmd.size()&&isdigit(cmd[c]))c++;
if(DBG)printf("get num %s\n",cmd.substr(cur+2,c-cur-2).c_str());
if(c-cur==3&&pp)cur+=2; //only .
else cur+=c-cur;
}
else cur++; //useless
return "";
}
else{
int c=cur;
while(cur<cmd.size()&&cmd[cur]!='\\')cur++;
return cmd.substr(c,cur-c);
}
}
void ans(){
int cur=0;
string next,res;
while(1){
if(cur>=cmd.size())break;
next=getCmd(cur);
if(DBG)printf("next: %s\n",next.c_str());
res+=next;
}
printf("%s\n",res.c_str());
}
int main(){
char chs[1024];
markup=1;
while(fgets(chs,1024,stdin)){
if(chs[0]=='\n'){printf("\n");continue;}
if(chs[strlen(chs)-1]=='\n')chs[strlen(chs)-1]='\0';
cmd=chs;
ans();
}
}
, the circumflex. The character (or in one case, the two characters) immediately following the control sequence introducer will direct your software in performing its special functions. Here is the complete list of control sequences you will need to interpret:
of zeros and ones. Zero represents white squares and one represents black squares. Some squares of the crossword are numbered and assigned to these numbers are the descriptions of the words that should be written either ``across'' or ``down'' into the crossword. A square is numbered if it is a white square and either (a) the square below it is white and there is no white square immediately above, or (b) there is no white square immediately to its left and the square to its right is white. The squares are numbered from left to right, from the top line to the bottom line.
characters. Black square and white squares (numbered and not numbered square) are represented as follows (where nnn is the number of the square):