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

 /* printf.cc
 * 2014/09/02 update
 */
 #include <iostream>
 using namespace std;

 int main() {
     printf("abcd"
         "efg\n");

     char* var[] = {
         "adf",
         "def" //没有逗号，故自动连接在一起
         "ghi",
     };

     //sizeof(var)为8
     //sizeof(var[0])为4
     printf("size of var is: %d\n", sizeof(var)/sizeof(var[]));

     for(size_t sz = ; sz < sizeof(var)/sizeof(var[]); sz++)
         cout << var[sz] << endl;

     int p = ;
     size_t apple = sizeof(int) * p;
     printf("apple is: %d\n", apple);

     int q = ;
     int res = p+++q;
     printf("res is: %d\n", res);    

     struct pig_id {
         unsigned int a;
     };
     return ;
 }

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