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1¡¢int    4×Ö½Ú
   long   8×Ö½Ú
   float  4×Ö½Ú
   double 8×Ö½Ú
   long double 16×Ö½Ú
2¡¢Ò»¸ö×Ö·û±äÁ¿Ö»ÄÜ´æ·ÅÒ»¸ö×Ö·û¡¢Ò»¸ö×Ö½Ú´æ·ÅÒ»¸ö×Ö½Ú
   char c;
   c = 'a';    c = '\034'    c = '\n'
   c = '\x65'    c = 65        c = 0101
   c = 0x41
3¡¢ÔËËã·û²Ù×÷
   -i++µÈ¼ÛÓÚ-(i++)
   i = 2;
   j = -i++;
   ÔËËã½á¹ûi=3 j=-2
4¡¢ÓÅÏȼ¶
  !Âß¼­·Ç > ËãÊõÔËËã·û > ¹ØÏµÔËËã·û > &&Âß¼­Óë > ||Âß¼­»ò
  a = 0; b = 1; c = 2; d = a++&&b++&&--c
  µÈ¼ÛÓÚ
  a = 0; b = 1; c = 2; d = (a++) && (b++) && (--c)
  ½á¹ûΪ
  a = 1; b = 1; c = 2; d = 0;
  a = 0; b = 1; c = 2; d = a++||b++||--c;
  µÈ¼ÛÓÚ
  a = 0; b = 1; c = 2; d = (a++) || (b++) || (--c);
  ½á¹ûΪ
  a = 1; b = 2; c = 2; d = 1;
5¡¢¸´ºÏ¸³ÖµÔËËã·û
  a += b  Ï൱ÓÚ a = a + b;
  a *= b + c Ï൱ÓÚ a = a * (b + c);
  a = 2; a += a *= a; µÈ¼ÛÓÚ a += (a *= a); ×îºóa = 8£»
  a = 5; b = 3;
  int max = --a == b++ ? a++ : b++;
  ×îºómax = 4;
6¡¢Ç¿ÖÆÀàÐÍת»»
  int a = 2;
  int b = 5;
  (float)b/aµÈÓÚ2.5
  (float)(b/a)µÈÓÚ2.0
7¡¢×Ö·û´®¿½±´º¯Êý
   char *strcpy(char *dest, const char *src);
   º¯Êý¹¦ÄÜ£º½«×Ö·û´®src¸´ÖƵ½×Ö·ûÊý×édestÖУ¬·µ»Ø¸´ÖƵÄ×Ö·û´®¡£
   src¿ÉÒÔÊÇ×Ö·ûÊý×éÃû¡¢³£Á¿»ò×Ö·ûÖ¸Õë±äÁ¿¡£
   dest¿ÉÒÔÊÇ×Ö·ûÊý×éÃû»ò×Ö·ûÖ¸Õë±äÁ¿¡£ÈôdestÊÇ×Ö·ûÖ¸Õë±äÁ¿£¬Òª×¢Òâ¸ø¸ÃÖ¸Õë±äÁ¿¸³³õÖµ¡£
   º¯Êý˵Ã÷£º
       ×Ö·ûÊý×é1³¤¶ÈÓ¦´óÓÚµÈÓÚ×Ö·û´®»ò×Ö·ûÊý×é2µÄ³¤¶È£»
       ×Ö·ûÊý×é1Ó¦¸Ãд³ÉÊý×éÃûµÄÐÎʽ
   ÀýÈ磺
   static char a[10] = "abcdefghi";
   char b[] = "happy";
 


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