scanf( "%[^\n]", str );     回车才返回
printf中 %zu 可输出size_t类型且不报警告

#include <stdio.h>
int main(void){
    int x = 5;
    printf("%d and ", sizeof(x++)); // note 1
    printf("%d\n", x); // note 2
    return 0;
}

#include <stdio.h>
static const unsigned char a[] = {
#include "values.txt"
};

int main(int argc, char *argv[])
{
    int i;
  
    for (i = 0; i < sizeof(a); ++i)
        printf("a[%d] = %d\n", i, a[i]);
    return 0;
} 

values.txt
1,2,3,4,5,
6,7,8,9,0,

来自Linux Kernel的例子，一般用得比较少
static struct usb_driver usb_storage_driver = {   .owner = THIS_MODULE,
                                                  .name = "usb-storage",
                                                  .probe = storage_probe,
                                                  .disconnect = storage_disconnect,
                                                  .id_table = storage_usb_ids,    };

int main() {
    struct mylist {int a; struct mylist* next;};
    #define cons(x, y) (struct mylist[]){{x, y}}
    struct mylist *list = cons(1, cons(2, cons(3, NULL)));
    struct mylist *p = list;
    while(p != 0) {
        printf("%d\n", p->a);
        p = p -> next;
    }
}