有关0的一些用法

#include "stdafx.h"#if 00 整形的零0.0 实型的零NULL 指针的零  00000000-FFFFFFFF （32位机器）牺牲一个地址（00000000）做标记用的 '\0' 字符的零 32-127  '0'~'9'(48-) 'a'-'z'(97-) 'A'-'Z'(65-) 用作结尾标记'0' ASCII的零  48 （可打印的零）#endifint _tmain(int argc, _TCHAR* argv[]){int a = 0;printf("0=%d\n", 0);printf("a=%d\n", a);float b = 0.0;printf("0.0=%.2f\n", 0.0);printf("b=%,2f\n", b);int* p = NULL;printf("NULL=%p\n", NULL);printf("p=%p\n", p);char c = '\0';printf("\'\\0\'=%d\n", '\0');printf("c=%d\n", c);char cc = '0';printf("%d   %c\t", '0', '0'); //48为显示的需要 ASCIIprintf("%d   %c\t", cc, cc); //48 0return 0;}