占用空间的大小

  void main()
 {
    char s[]="Welcometohengtian";

    printf("%s%d\n",(s+7),sizeof(s));

    char s[20]="Welcometohengtian";
    printf("%s%d\n",(s+7),sizeof(s));

    int a=4;
    printf("%d\n",sizeof(int));

    char *p="renyuan";
    printf("%d\n",sizeof(p));

    int b[5]={0};
    printf("%d\n",sizeof(b));

  }

输出的结果是:tohengtian18

              tohengtian20

        4

        4

       20

 

  void main()
 {
    char s[20]="Welcometohengtian";
     printf("%s%d\n",(s+7),sizeof(s));
  }

输出的结果是:tohengtian20

 

public class Test9 {

  public static void main(String[] args) {
    String hello="hello";
    String hel="hel";
    String lo="lo";
    System.out.println(hello=="hel"+"lo"); ///true????????????
    System.out.println(hello=="hel"+lo);
  }

}

输出的结果是:true  false

posted @ 2012-10-16 11:20  任智康  阅读(207)  评论(0编辑  收藏  举报