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
");

    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
", sizeof(var)/sizeof(var[0]));

    for(size_t sz = 0; sz < sizeof(var)/sizeof(var[0]); sz++)
        cout << var[sz] << endl;

    int p = 2;
    size_t apple = sizeof(int) * p;
    printf("apple is: %d
", apple);

    int q = 3;
    int res = p+++q;
    printf("res is: %d
", res);    

    struct pig_id {
        unsigned int a;
    };
    return 0;
}

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