【學習筆記】【C語言】類型說明符，學習筆記c語言

【學習筆記】【C語言】類型說明符，學習筆記c語言
1. short和long

3.代碼

 

 1 #include <stdio.h> 2 /* 3  int 4個位元組  %d 4  short 2個位元組 %d 5  long 8個位元組  %ld 6  long long 8個位元組 %lld 7   8   9  signed10  unsigned  %u11  */12 int main()13 {14     // 0000 0000 0000 0000 0000 0000 0000 000015     // 2的31次方-116     // 2的32次方-117     int num;18     19     /*20      signed和unsigned的區別：21       signed 最高位要當做符號位22      unsigned 最高位不要當做符號位23     */24     // signed == signed int25     // signed 有符號:正數、0、負數26     signed int a = 10;27     signed a2 = 10;28     29     // unsigned int == unsigned30     // unsigned 無符號：0、正數31     unsigned int b = 10;32     unsigned b2 = 10;33     34     long unsigned int c = 34343;35     long unsigned c2 = 423432;36     37     short unsigned int d = 4343;38     short unsigned d2 = 43243;39     40     short signed int e = 54354;41     short signed e2 = 434;42     43     44     45     46     return 0;47 }48 49 void longAndShort()50 {51     // long == long int52     long int a = 100645654654645645l;53     long a2 = 100645654654645645l;54     55     // long long int == long long56     long long int c = 100645654654645645ll;57     long long c2 = 4535435435435ll;58     59     // short == short int60     short int d = 5454;61     short d2 = 43434;62     63     //printf("%lld\n", c);64     65     int s = sizeof(long long int);66     printf("%d\n", s);67 }