《程序设计》期末试卷和答案 - A

1、The C Programming Language EXAMINATION PAPER and AnswerSection 1: Fill in the blanks（2 mark for each item, total 20 marks） 1.1 The value of expression  1<10<5  is _1_.1.2 The valu

2、e of expression 1+4/5+15<7+4%5+(8,10) is _1_. 1.3 What value is stored into the int variable b in each of the following? Assume that b is int variables with b containing 12. b*=2+3 b=_60_.1.4  The statement for (i=1; i<=9; i+) pr

3、intf(“%3d”, _3*i+2_);prints out the following numbers: 1 4 7 10 13 16 19 22 25. 1.5 According to the declaration: int a35，the number of elements of array a is 15 .1.6 The

4、 following code fragment will output _2WE_.char s="WEIHAI"sstrlen(s)/2-1=0;printf("%d%sn",strlen(s),s);1.7 The output of the following statements is _k=10,s=25_.int k, s;for(k=1, s=0; k<10; k+)   if

5、0;(k%2=0) continue;      s += k;   printf("k=%d s=%d", k, s); 1.8 The running result of  following program is: _      2,6,42,        vo

6、id fun()     static int a=1;      a*=a+1; printf(“%d,”,a);        main()      int cc;      for(cc=1;cc<4;cc+) fu

7、n();    1.9 The output of the following program is _5_.f (int x)  if(x<=1) return 1; else return f(x-1)+f(x-2);  void main( )   printf("%d", f(4);&

8、#160; 1.10 The output of the following statements is _-1_.printf("%d", 'M' - 'N')Section 2: Single Choice（2 mark for each item, total 40 marks） 122.1 Every C progra

9、m consists of at least how many functions? AA1 B2 C3 D42.2 The precedence (优先级) of operator  _  is the lowest one. AA, B!= C&& D= 2.3 Which of following is an illegal user-define symbol?&

10、#160; CAn BPAY_DAY C6Set Dnum52.4 Which operator can only be applied to integers?     AA%=   B/   C=   D<= 2.5 According to the C syntax, _is the legal character constant in the followings. BA

11、n B18 C Dxab2.6 The expression _can NOT express the statement ”both x and y are zero”. CAx=0 && y=0 B!x && !y Cx=0 | y=0D!(x | y)2.7 The statement _ is correct if a is an integer variable and b is a double precision float variable . CAscanf(“%d,%f”, &a, &b); Bscanf(“a=%d b=%*

12、f”, &a, &b); Cscanf(“%d%*lf”, &a, &b); Dscanf(“%d%*lf”, &a );2.8  Assuming x is 10, what is the output: printf(“%d”,+x);  DA8                 

13、60;                  B9 C10                      D112.9 Determine the output of&

14、#160;the following program. Bmain()    int n = 8;  while (n > 5)     n-;   printf(“%d”, n);   A876   B765   C8765  D7654 2

15、.10 The running result of  following program is . A#include<stdio.h>main()int a=1;switch(a) case 0: printf("() ");case 1: printf("(*>_<*)");case 2: printf(" (_) ");break; default: printf("(*_*) ");printf("%d",a);A(*>_<*)(_)1B()

16、(*>_<*)1C(*>_<*) (_) (*_*)1D (_) (*>_<*)12.11 What would the heading（函数首部） for a value-returning function named Mul look like if it had two int parameters,num1 and num2, and returned a int result? AAint Mul(int num1,int num2)Bint Mul(num1,num2);Cvoid Mul(int num1,int num2)Dint Mul(

17、int,int); 2.12  The following code fragment prints out _.  B#define MA(x, y) (x)*(y) int i = 2; i = 3/MA(i, i+2)+5; printf(“%dn”, i); A11 B9 C8 D52.13 If strcopy is used in th

18、e program,what kind of file shall be included? DAstdio.h Bstring,h Cmath.h Dstring.h2.14  The program segment (程序段) below reverses(逆序) the string s in the place, which one is written correctly? BAfor (i = 0, j = strlen(s

19、); i < j; i+, j-) c = si, si = sj, sj = c; Bfor (i = 0, j = strlen(s)-1; i < j; i+, j-)  c = si, si = sj, sj = c; 

20、C for (i = 0, j = strlen(s)-1; i < j; i+, j-)  c = si;  si = sj;  sj = c; Dfor (i = 0, j = strlen(s); i < j; i+, j-)

21、60;   c = si;  si = sj;  sj = c; 2.15 In the statement while(x), choose the equivalent expression for the x. DAx=0 Bx=1 Cx!=1 Dx!=02.16 _ is wrong. CAchar *p="string"Bchar str ="string" 

22、;Cchar str10; str="string"  Dchar *p; p="string" 2.17 which one statement is correct ? AAchar s23=“xy”； Bchar s14=“abcd”；Cchar s33=a,x,y;Dchar s423=“xyz”,“abc”;2.18 Determine the output of the value of b. CInt a42 = 1,2,3,4,5,6,7,8;b = *(*(a + 2

23、) + 1);A4B5C6 D72.19 The running result of following program is . Cinclude “stdio.h”main() struct person char name30; char gender; int age; student;A30 B32 C33 D342.20 What is the functionality of function “rewind”?  CAopen the file again;Breturn the

24、 length of the file Cpush the pointer to the beginning of the file Dpush the pointer to the end of the fileSection 3: Read each of the following programs and answer questions (3 marks for item, total marks: 6) 33.1 When&

25、#160;input:  how are you? <ENTER>, the output is _ How Are You _.#include <stdio.h> void main( )    int word;   char ch;     word=0;   whi

26、le(ch=getchar()!='?') if (ch=' ') word=0;    else if(word=0)   word=1;     if(ch<='z'&&ch>='a')      ch=ch-'a'+'A'   &

27、#160;    putchar(ch);     3.2 The following program will output i=6, k=4.#include <stdio.h> void main()  int i,j,k=19; while (i=k-1)  k-=3; if(k%5=0)  i+; continue;  els

28、e if(k<5) break; i+;  printf(“i=%d,k=%dn”,i,k);  Section 4: According to the specification, complete each program (2 mark for each blank, total: 20 marks) 2344.1 calculate the value of k=1+3+5+ +99. #in

29、clude <stdio.h> main( ) int i , k=0; for (i=1;i<=100; _ （1） i+=2/i+,i+/i=i+2_ ) k = _（2）_i+k_ printf(“k = %dn”,k); 4.2 The function RemoveZeroElements(array,n)goes through an array of integers and eliminates any elements 

30、whose value is 0.For example,suppose that scores contains an array of score on an optional exam as shown: scores 650950079820849486900At this point,the function should remove the 0 scores,compressing the array into the following configuration: 65 95798284948690? Filling the blank to complete the&#