TeX中的引号

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!''

#include<stdio.h>
int main()
{
int c,q=1;
while((c=getchar())!=EOF)
{
if(c=='"')
{
printf("%s", q?"``":"''");
q=!q;
}
else    printf("%c", c);
}
return 0;
}