Cö¾ÙÀàÐ͵ÄʹÓ÷½·¨
1. ö¾ÙµÄ¶¨Òåö¾ÙÀàÐͶ¨ÒåµÄÒ»°ãÐÎʽΪ£º
enum ö¾ÙÃû{ ö¾ÙÖµ±í };
ÔÚö¾ÙÖµ±íÖÐÓ¦ÂÞÁгöËùÓпÉÓÃÖµ¡£ÕâЩֵҲ³ÆΪö¾ÙÔªËØ¡£
ÀýÈ磺
¸Ãö¾ÙÃûΪweekday£¬Ã¶¾ÙÖµ¹²ÓÐ7¸ö£¬¼´Ò»ÖÜÖеÄÆßÌì¡£·²±»ËµÃ÷ΪweekdayÀàÐͱäÁ¿µÄÈ¡ÖµÖ»ÄÜÊÇÆßÌìÖеÄijһÌì¡£
2. ö¾Ù±äÁ¿µÄ˵Ã÷
Èçͬ½á¹¹ºÍÁªºÏÒ»Ñù£¬Ã¶¾Ù±äÁ¿Ò²¿ÉÓò»Í¬µÄ·½Ê½ËµÃ÷£¬¼´Ïȶ¨Òåºó˵Ã÷£¬Í¬Ê±¶¨Òå˵Ã÷»òÖ±½Ó˵Ã÷¡£
ÉèÓбäÁ¿a,b,c±»ËµÃ÷ΪÉÏÊöµÄweekday£¬¿É²ÉÓÃÏÂÊöÈÎÒ»ÖÖ·½Ê½£º
enum weekday{ sun,mou,tue,wed,thu,fri,sat };
enum weekday a,b,c;
»òÕßΪ£º
enum weekday{ sun,mou,tue,wed,thu,fri,sat }a,b,c;
»òÕßΪ£º
enum { sun,mou,tue,wed,thu,fri,sat }a,b,c;
ö¾ÙÀàÐÍÔÚʹÓÃÖÐÓÐÒÔϹ涨£º
1. ö¾ÙÖµÊdz£Á¿£¬²»ÊDZäÁ¿¡£²»ÄÜÔÚ³ÌÐòÖÐÓø³ÖµÓï¾äÔÙ¶ÔËü¸³Öµ¡£
ÀýÈç¶Ôö¾ÙweekdayµÄÔªËØÔÙ×÷ÒÔϸ³Öµ£º
sun=5;
mon=2;
sun=mon;
¶¼ÊÇ´íÎóµÄ¡£
2. ö¾ÙÔªËر¾ÉíÓÉϵͳ¶¨ÒåÁËÒ»¸ö±íʾÐòºÅµÄÊýÖµ£¬´Ó0¿ªÊ¼Ë³Ðò¶¨ÒåΪ0£¬1£¬2…¡£ÈçÔÚweekdayÖУ¬sunֵΪ0£¬monֵΪ1£¬…,satֵΪ6¡£
¡¾Àý11.10¡¿
main(){
enum weekday
{ sun,mon,tue,wed,thu,fri,sat } a,b,c;
a=sun;
b=mon;
c=tue;
printf("%d,%d,%d",a,b,c);
}
˵Ã÷£º
Ö»ÄÜ°Ñö¾ÙÖµ¸³Óèö¾Ù±äÁ¿£¬²»ÄÜ°ÑÔªËصÄÊýÖµÖ±½Ó¸³Óèö¾Ù±äÁ¿¡£È磺
a=sum;
b=mon;
ÊÇÕýÈ·µÄ¡£¶ø£º
a=0;
b=1;
ÊÇ´íÎóµÄ¡£ÈçÒ»¶¨Òª°ÑÊýÖµ¸³Óèö¾Ù±äÁ¿£¬Ôò±ØÐëÓÃÇ¿ÖÆÀàÐÍת»»¡£
È磺
a=(enum weekday)2;
ÆäÒâÒåÊǽ«Ë³ÐòºÅΪ2µÄö¾ÙÔªËظ³Óèö¾Ù±äÁ¿a£¬Ï൱ÓÚ£º
a=tue;
»¹Ó¦¸Ã˵Ã÷µÄÊÇö¾ÙÔªËز»ÊÇ×Ö·û³£Á¿Ò²²»ÊÇ×Ö·û´®³£Á¿£¬Ê¹ÓÃʱ²»Òª¼Óµ¥¡¢Ë«ÒýºÅ¡£
¡¾Àý11.11¡¿
main(){
enum body
{ a,b,c,d } month[31],j;
int i;
j=a;
for(i=1;i<=30;i++){
month[i]=j;
j++;
if (j>d) j=a;
&n
Ïà¹ØÎĵµ£º
ubuntuϵÄc/c++»·¾³´î½¨ÊDZȽϼòµ¥,ÒòΪÓÐaptºÍÐÂÁ¢µÃµÄ°ïÖú.
1.
Ê×ÏÈÊÇÅäÖÃgcc,ÔÚubuntu°²×°Íê³ÉÒѾÓÐgccÁË(gccÊÇÓÉGNUÖ®¸¸StallmanËù¿ª·¢µÄlinuxϵıàÒëÆ÷£¬È«³ÆΪGNU
Compiler Collection£¬ Ä¿Ç°¿ÉÒÔ±àÒëµÄÓïÑÔ°üÀ¨£ºC, C++, Objective-C, Fortran, Java,
and
Ada.).µ«ÊÇgcc»¹²»ÄܱàÒëÎļþ.ÒòΪȱÉÙһЩͷÎļþ.Ä ......
#include <stdio.h>
unsigned int reverse_bits(unsigned int value)
{
unsigned int answer;
unsigned int i;
answer = 0;
for(i=1;i!=0;i<<=1){ //´ËÑ»·¿ÉÒÔºöÂÔ»úÆ÷µÄ²îÒì¡£64λºÍ32λ½Ô¿ÉÓã¬Ôö ......
static
DataManager
*
sharedDataManager
=
nil;
+
(DataManager
*
) sharedManager
{
@synchronized(self)
{
if
(sharedDataManager
==
nil)
&nb ......
Ê×ÏȽøÐÐÒ»¸öʵÑ飬·Ö±ð¶¨ÒåÒ»¸ösigned intÐÍÊý¾ÝºÍunsigned intÐÍÊý¾Ý£¬È»ºó½øÐдóС±È½Ï£º
unsigned int a=20;
signed int b=-130;
a>b?»¹ÊÇb>a£¿ÊµÑéÖ¤Ã÷b>a£¬Ò²¾ÍÊÇ˵£130>20,Ϊʲô»á³öÏÖÕâÑùµÄ½á¹ûÄØ£¿
ÕâÊÇÒòΪÔÚCÓïÑÔ²Ù×÷ÖУ¬Èç¹ûÓöµ½ÎÞ·ûºÅÊýÓëÓзûºÅÊýÖ®¼äµÄ²Ù×÷£¬±àÒëÆ÷»á×Ô¶¯×ª»¯ÎªÎÞ·ûºÅ ......
µÚÒ»Ì⣺
ÏÂÃæ³ÌÐòµÄÊä³ö½á¹û£¿
#include <stdio.h>
#include <iostream>
void main()
{
char str1[] = "";
char str2[] = "";
const char str3[] = "abc";
const char str4[] = "abc";
const char* str5 = "abc";
const char* str6 = "a ......