UVa 391 - Mark-up

Accepted date: 2013-10-31
Language: C++

/*
  UVa 391 - Mark-up

  To build using Visual Studio 2012:
    cl -EHsc -O2 UVa_391_Mark_up.cpp
*/

#include <cstdio>
#include <cctype>

int main()
{
  bool mark_ups = true;
  int c;
  while ((c = getchar()) != EOF) {
    if (c == '\\') {
      if ((c = getchar()) == EOF) {
        putchar('\\');
        return 0;
      }
      else if (c == '*')
        mark_ups = !mark_ups;
      else if (mark_ups) {
        switch (c) {
        case 'b': case 'i':
          break;
        case 's':
          do
            c = getchar();
          while (isdigit(c) || c == '.');
          if (c == EOF)
            return 0;
          else
            ungetc(c, stdin);
          break;
        default:
          putchar(c);
          break;
        }
      }
      else {
        ungetc(c, stdin);
        putchar('\\');
      }
    }
    else
      putchar(c);
  }
  return 0;
}