C- printf的使用

ASC C之后引入的一个特性是，相邻的字符可以被自动连接

 1 /* printf.cc
 2 * 2014/09/02 update
 3 */
 4 #include <iostream>
 5 using namespace std;
 6 
 7 int main() {
 8     printf("abcd"
 9         "efg
");
10 
11     char* var[] = {
12         "adf",
13         "def" //没有逗号，故自动连接在一起
14         "ghi",
15     };
16 
17     //sizeof(var)为8
18     //sizeof(var[0])为4
19     printf("size of var is: %d
", sizeof(var)/sizeof(var[0]));
20 
21     for(size_t sz = 0; sz < sizeof(var)/sizeof(var[0]); sz++)
22         cout << var[sz] << endl;
23 
24     int p = 2;
25     size_t apple = sizeof(int) * p;
26     printf("apple is: %d
", apple);
27 
28     int q = 3;
29     int res = p+++q;
30     printf("res is: %d
", res);    
31 
32     struct pig_id {
33         unsigned int a;
34     };
35     return 0;
36 }

$ ./a.exe
abcdefg
size of var is: 8
adf
defghi
apple is: 8
res is: 5