摘要：
#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;} 阅读全文
摘要：
TEX is a typesetting language developed by Donald Knuth. It takes source text together with a few typesetting instructions and produces, one hopes, a 阅读全文