C語言庫函數(shù)速查[CHM文檔]是一個(gè)很好的C語言函數(shù)查詢器.屬于CHM文檔.
iscntrl
原型：extern int iscntrl(int c)
用法：#include <ctype.h>
功能：判斷字符c是否為控制字符
說明：當(dāng)c在0x00-0x1F之間或等于0x7F(DEL)時(shí)，返回非零值，否則返回零。
Documentation and source code Copyright (C) 1985 by Mark
E. Mallett permission is granted to distribute this document
and the code indiscriminately. Please leave credits in place,
and add your own as appropriate.
