25.完成下列程序
..
......
............
....................
..............................
..........................................
........................................................
#include
#define N 8
int main()
{
int i;
int j;
int k;
---------------------------------------------------------
| |
| |
| |
---------------------------------------------------------
return 0;
}
26 完成程序,實現對數組的降序排序
#include
void sort( );
int main()
{
int array[]={45,56,76,234,1,34,23,2,3}; //數字任//意給出
sort( );
return 0;
}
void sort( )
{
____________________________________
| |
| |
|-----------------------------------------------------|
}
27 費波那其數列,1,1,2,3,5……編寫程序求第十項?梢杂眠f歸,也可以用其他方
法,但要說明你選擇的理由。
#include
int Pheponatch(int);
int main()
{
printf("The 10th is %d",Pheponatch(10));
return 0;
}
int Pheponatch(int N)
{
--------------------------------
| |
| |
--------------------------------
}
28 下列程序運行時會崩潰,請找出錯誤并改正,并且說明原因。
#include
#include
typedef struct{
TNode left;
TNode right;
int value;
} TNode;
TNode root=NULL;
void append(int N);
int main()
{
append(63);
append(45);
append(32);
append(77);
append(96);
append(21);
append(17); // Again, 數字任意給出
}
void append(int N)
{
TNode NewNode=(TNode )malloc(sizeof(TNode));
NewNode->value=N;
if(root==NULL)
{
root=NewNode;
return;
}
else
{
TNode temp;
temp=root;
while((N>=temp.value && temp.left!=NULL) || (N
NULL
))
{
while(N>=temp.value && temp.left!=NULL)
temp=temp.left;
while(N
temp=temp.right;
}
if(N>=temp.value)
temp.left=NewNode;
else
temp.right=NewNode;
return;
}
}
29. A class B network on the internet has a subnet mask of 255.255.240.0, what
is the maximum number of hosts per subnet .
a. 240 b. 255 c. 4094 d. 6553
4
30. What is the difference: between o(log n) and o(log n^2), where both logari
thems have base 2 .
a. o(log n^2) is bigger b. o(log n) is bigger
c. no difference
31. For a class what would happen if we call a class’s constructor from with
the same class’s constructor .
a. compilation error b. linking error
c. stack overflow d. none of the above
32. “new” in c++ is a: .
a. library function like malloc in c
b. key word c. operator
d. none of the above
33. Which of the following information is not contained in an inode .
a. file owner b. file size
c. file name d. disk address
34. What’s the number of comparisons in the worst case to merge two sorted li
sts containing n elements each .
a. 2n b.2n-1 c.2n+1 d.2n-2
35. Time complexity of n algorithm T(n), where n is the input size ,is T(n)=T(
n-1)+1/n if n>1 otherwise 1 the order of this algorithm is .
a. log (n) b. n c. n^2 d. n^n
36. The number of 1’s in the binary rePsentation of 34096+ 15256+516+3 a
re .
a. 8 b. 9 c. 10 d. 12
37.設計函數 int atoi(char s)。
38.int i=(j=4,k=8,l=16,m=32); printf(“%d”, i); 輸出是多少?
39.解釋局部變量、全局變量和靜態變量的含義。
40.解釋堆和棧的區別。
41.論述含參數的宏與函數的優缺點。
42. 以下三條輸出語句分別輸出什么?[C易]
char str1[] = "abc";
char str2[] = "abc";
const char str3[] = "abc";
const char str4[] = "abc";
const char str5 = "abc";
const char str6 = "abc";
cout << boolalpha << ( str1==str2 ) << endl; // 輸出什么?
cout << boolalpha << ( str3==str4 ) << endl; // 輸出什么?
cout << boolalpha << ( str5==str6 ) << endl; // 輸出什么?
答:分別輸出false,false,true。str1和str2都是字符數組,每個都有其自己的存儲區,它們的值則是各存儲區首地址,不等;str3和str4同上,只是按const語義,它們所指向的數據區不能修改。str5和str6并非數組而是字符指針,并不分配存儲區,其后的“abc”以常量形式存于靜態數據區,而它們自己僅是指向該區首地址的指針,相等。
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