[问题] 100台联大计概考古

楼主: fb74123698 (PP瑄)   2012-06-29 15:59:27
4.Consider the C program on the right side.What will be printed on the standard output after program finishes?
struct point{int x;int y;};
int main(){
struct point p,q;
struct point *r;
r=&q;
q.x=p.y=1;
q.y=p.x=2;
r->x=2;
p.y=1;
printf("%d,%d",q.x,q.y);
return 0;
}
A.2,2 B.2,1 C.1,2 D.1,1 E.none of the above
2.A 2D array X[1...10][1...100]is declared in a program.The address of X[1][1]is 1200,and the size of each element of the array is 4.What address of X[3][2]is if the memory system uses row majar storage?
A.1232
B.1264
C.1328
D.2408
E.none of the above
请问这两题的答案怎么算
第二题 我算出来都不是ABCD里..
作者: forris (科科...)   2012-07-01 01:45:00
第二题我算是 2004第一题是 A 吗?用程式跑一次, 第一题是 A 无误。第一题重点在 call-by-reference. r & q 共用内存空间原本 q.x = 1, 后来 r.x = 2 --> q.x = 2
楼主: fb74123698 (PP瑄)   2012-07-01 02:31:00
第二题我也算2004,没在答案上比较不放心..第一题大概了解了,不过细微的得自己再去弄懂,真的谢谢你!

Links booklink

Contact Us: admin [ a t ] ucptt.com