C程序设计试题及题解

1、00000000000000000C程序设计试题及题解目录一 选择题············································&#

2、183;················1. C语言概述································

3、··························2. 数据类型，运算符与表达式·····················

4、83;·····················3. 选择结构程序设计··························

5、3;····························4. 循环控制····················

6、83;··········································5. 数组······

7、3;·························6. ························&

8、#183;·············7. 函数···································&#

9、183;·······························8. 预处理命令·················

10、·············································9. 指针····&

11、#183;·················································&

12、#183;············10. 结构体与共用体···································&#

13、183;·················11. 位运算·······························&

14、#183;·································12. 文件···············&

15、#183;·················································&

16、#183;····二 改错题············································&#

17、183;························1. 统计字符串中大小写字母的个数······················

18、83;···················2. 逆序输出·····························&#

19、183;···································3. 计算大于10的最小n个能被3整除的正整数之和··········&

20、#183;···················4. 输入两个整数及一个运算符进行运算···························

21、····5. 输出201300之间的所有素数，统计总个数···································6. 统计输入字符串中大写类英文字母的个数···

22、83;·································7. 输入M个整数，输出其中所有的偶数·············&#

23、183;················8. 输出三角形································

24、······························9. 百元买百鸡··················

25、3;··········································10、将08的数字字符变成比它大1的数字字符将9变为0···&

26、#183;····11、连接字符串············································

27、;··················12、取出ASCII码值为偶数且下标为偶数的字符····························

28、;······13. 求三角形面积··········································&

29、#183;··················14. 百马百担问题·····························

30、83;·······························15. 求一堆零件的总数（100至200之间）··············

31、3;·························16. 交换两个变量的值······················

32、3;·································17. 计算1至100之间的奇数之和，偶数之和·············

33、;························18. 求满足给定等式的未知数的值·······················

34、············三 填空题·····································&

35、#183;······························1. 计算给定的公式·················

36、83;·······················2. 计算圆周率·························&

37、#183;·····································3. 从10个数中找出最大值和最小值·········&

38、#183;··································4. 计算满足一定条件的一位整数的值············&

39、#183;·······················5. 输入若干个整数,统计其中大于0和小于0的个数······················

40、·······6. 歌德巴赫猜想·········································

41、83;··················7、牛顿迭代法求方程的根·····························

42、83;······················8、大写变小写，小写变大写·························&#

43、183;·······················9、计算平均值·························&

44、#183;···································10、输入姓名，输出信息············&

45、#183;·······································11、冒泡排序法·········

46、;··················································

47、;··12、判断三角形是否为直角三角形············································13、输入一个

48、整数，输出该数的平方··········································14、选择排序法·····

49、··················································

50、·····15、用所给公式计算三角形面积··········································

51、83;···16. 输入一个4×4阶矩阵,并计算第1列元素之和·······························17. 二分法查找元素········

52、3;··············································18. 判断点是否在已知的圆内·&

53、#183;··············································19、求函数值··

54、··················································

55、··········20. 计算已知公式的值······································

56、·················21. 求数组中的最大元素·······························

57、;······················22. 计算前m个整数的和·························

58、3;··························23. 字符串反向存储······················

59、;··································24. 将学生信息按其学号的升序排列·············

60、;······························25. 输入一个3行3列的整型数组，求其最大值和最小值···············&#

61、183;········26、计算给定的公式的值·······································&#

62、183;···27、输出Fibonacci数列的前15项···········································

63、;四 编程题·················································

64、················1输入数字，求已知公式的值································

65、;···············2. 统计输入字符串中空格的个数································&

66、#183;············3. 函数求值····································

67、···························4. 求已知函数的值·····················&#

68、183;···································5. 将三个字符串从小到大排序后输出···········&#

69、183;·····················6. 求已知函数f( )的值··························

70、··························7. 四则运算·······················

71、;·······································8. 判断一个矩阵是否为对称矩阵········&

72、#183;···································9. 打印出Fibonacci，数列的前20个数··········&

73、#183;····························10. 计算fun( )函数值··················

74、3;···································11. 按要求实现函数功能············

75、83;······································12、函数fun1( )求值·········&

76、#183;············································13. 输入的一个月工资数额，求应交税款··

77、;····································14. 按要求处理一个4阶矩阵···········&#

78、183;···································15. 求已知f(x)函数的值············

79、;········································16. 将以指针数组形式存放的n个字符串升序排序······

80、;·······················17. 求方程中的较大的根························

81、3;··························18. 判别两个字符串的大小·····················&#

82、183;···························一、选择题（1）C语言概述1、C程序中main函数的位置（C）A、必须在最开始 B、必须在系统库函数后面C、可以在自定义函数后面 D、必须在最后2、下面关于C语言用户标识符的描述，正确的是（D）A、不能区分大小写 B、用户标识符不能描述常量C、类型名也是用户标识 D、

83、用户标识符可以作为变量名3.关于C语言的叙述中，不正确的是（D）A. C程序可由一个或多个函数组成B. C程序必须包含一个main（）函数C. C程序的基本组成单位是函数D. 注释说明只能位于一条语句的后面括（A）4.若有说明语句：char C=95;则变量C包含(D)个字符A.1 B.2 C.3 D.语法错误5.结构化程序设计不包A.最优化 B自顶而下，逐步细化 C 模拟化设计 D结构化编码 6.结构化程序设计的三种基本语句是(C)A.函数结购, 分支结构 判结构B.函数结构 嵌套结构 平行结构C.顺序结构 分支结构 循环结构D.分支结构 循环结构 嵌套结构7.关于C语言数据类型的A.枚举类

84、型不是基本类型 B.数组不是构造类型C.变量必须先定义后使用 D.不允许使用空类型8.关于C语言的源程序的叙述中,错误的是(C)A.C语言的源程序由函数构成 B.main函数可以书写在自定义函数之后C.必须包含有输入语句 D.一行可以书写多个语句9.下面叙述中，（A）不是结构化程序设计中的三种基本结构之一 A.数据结构 .B.选择结构 C.循环结构 D.顺序结构10.char 型变量存放的是（A）A.ASC码值 B.字符本身 . C十进制代码值 . D十六进制代码值11.已有如下定义和输入语句int a; char c1,c2;scanf(“%d，%c，%c”, a, c1, c2);若要求a

85、、c1、c2的值分别为10、A和B，正确的数据输入是（ B ）A10ABB10,A,BC10A BD10 AB12.以下叙述不正确的是（ D ）A、C程序的执行总是从main函数开始B、一个C源程序必须包含一个main函数C、C语言程序的基本组成单位是函数D、在编译C程序源程序时，可发现注释中的拼写13.已知如下定义和输入语句：int a, b;scanf (“%d, %d”，a, b);若要求a、b的值分别为10和20，正确的数据输入是（B）A、10 20 B、10，20 C、a=10, b=20 D、10；2014、在C语言源程序中，以下叙述正确的是（C）A、main函数必须位于文件的开头

86、B、每行只能写一条语句C、程序中的每一语句可以写成几行D、每个语句的最后必须有点号15.对于C语言源程序,以下叙述错误的是( C )A. 可以有空语句B. 函数之间是平等的,在一个函数内部不能定义其它函数C. 程序调试时如果没有提示错误,就能得到正确结果D. 注释可以出现在在语句的前面16下面叙述中，（A）不是结构化程序设计三种基本结构的共同特点先判断后执行 单入口，单出口，程序中没有执行不到的语句 无死循环17.若有定义:int x=1234,y=123,z=12;则语句printf(“%4d+%3d+%2d”,x,y,z);运行后的输出结果为(D)C.1234+1234+1234 D.12

87、34+123+12（2）数据类型，运算符和表达式1、若定义：int x=2; y=3; float i； 则以下符合C语言语法的表达式是（B）A、x=x* 3=2 B、x=(y= = 1) C、i=float(x) D、i%(-3)2、若有定义：int a=5, b=2, c=1；则表达式a-b<c|b=c的值是（A）A、0 B、1 C、2 D、-13、若有68定义：float x=3.5; int z=8; 则表达式x+z%3/4的值是（B）A、3.75 B、3.5 C、3 D、44.若有定义：int a=1，b=2，c=3；语句+a|+b+a运行后b的值为（D）A1 B.0 C.2

88、D.35.设单精度型变量+，g的值均为2.0，使+为4.0的表达式为（A）A.1 B.0 C.2 D.39.对于整型变量x，下述计语句（B）与赋值句：x=x%2=0？1：0；不等价A .if（x%2！=0）x=0；else x=1； B if（x%2）x=1；else x=0；C.if（x%2= =0）x=1；else x=0； D .if（x%2=1） x=0；else x=1；12.下面语句正确的是（ B C ）A int *P；*P=20； B char *s=“abcdef”；printf（“%sn”,s）;C char str=“abcdf”；000000000000printf（“

89、%s”,str）; D char str=a,b,c;printf(“%s”,str);13.若有定义:int；则正确的赋值表达式是（）.- =(a*3) B.double(-a) C.a* D.a*4=314.若有定义：int m=5. n=3则表达式（m+1，n+1，（-m）+（n-）的值是（B）A.6 B.7 C.8 D.915.对于基类型相同的两个指针变量之间，不能进行的运算是（C）A. B. C. D.16.若有定义:int a;则语句a=(3*4)+2%3;运行后a的值为(B)A. 12 B.14 C.11 D.1717.下面叙述中,错误的是(A)A.其算术运算对象不包含函数 B.

90、%(模拟运算符)的运算对象只能为整型量C.算术运算的结合方向是“自左向右” D.自加和自减运算符的结合方向是“自右向左”18.已知int a=R；则正确的表达式是（A）A.a%10 B.a=int（3e2） C .2a=a+ D.a=a+a=a+319.已知double a=5.2；则正确的赋值表达式是（A）A.a+=a-=（a=4）*(a=3) B a=a*3=2 C a%3 D a=double(-3)20.以下的计语句中,x的值一定被重新赋值的是(B)A.if(x=y) x+=y; B if(xyx!=y);x+=y; C.if(x!=y) scanf(“%d”,x) else scan

91、f(“%d”,y); D.if（xy） x+；y+21.设有double型变量a，b，c，e均有值，对代数式（3ae）/（bc），不正确的语言表达式是（C）A.a/b/c*e*3 B.3*a*e/b/c C.3*a*e/b*c D.a*e/c/b*322.以下运算符中优先级最高的是(D)A. B.| C. D.+23.若有自定义:int a,b;double x.,则以下不符合C语言的表达是(A)A.x%(-3) B.a+=-2 C.a=b=2 D.x=a+b24.若有定义:int a3 3;则表达式a21-a的值为(B)A.7 B.8 C.6 D.925.以下（D）是正确的变量名A.a.be

92、e B.-P11 C.int D.P1126.若有定义：int a=1，b=2 ，c=3，d=4，x=5，y=6 则表达式（x=ab）（y=cb）的值为（A）A.0 B.1 C. 5 D.627.以下（D）是正确变量名A.5f B.if C.f.5 D._f528.若有定义：int x=3，y=4，z=5 则值为0的表达式是（D）A.xy B. x=y C. x|y=zy-z D. ！（xy）！z|1）29.若有定义：int x,a；则语句x=(a=3,a+1)；运行后x、a的值依次为（ C ）A3，3B4，4C4，3D3，430.若有定义：int a,b；则表达式(a=2,b=5,a*2,b

93、+,a+b)的值是（ B ）A7B8C9D1031.若有定义：int a=2,b=3;float x=3.5,y=2.5;则表达式(float)(a+b)/2+(int)x%(int)y的值是（A）A3.5B3.0C2.5D2.032. 以下（B）是错误的整型常量A、-0xcdf B、018 C、0xe D、01133.语句a=(3/4)+3%2; 运行后，a的值为（B）A、0 B、1 C、2 D、334.设整形变量a为5， 使b不为2的表达式是（C）A、b=(+a)/3 B、b=6-(-a) C、b=a%2 D、b=a/235、已知char a=R；则不正确的赋值表达式是（D）；A、a=(a

94、+)% 4 B、a+2=3 C、c a+=256- D、a=07836.下面叙述正确的是（B）A、2/3与2.0/3.0等价 B、（int）2.0/3与2/3等价C、+5与6等价 D、A与“A”等价37、getchar( )函数的功能是从终端输入（D）A、一个整型量值 B、一个实型变量值 C、多个字符 D、一个字符38、若有定义：int i=7, j=8; 则表达式 i >j|i<j的值为（A）A、1 B、变量i的值 C、0 D、变量j的值39、若有定义：int i ，j；则表达式（i=2, j=5, i+, i+j+）的值是（B）A、7 B、8 C、9 D、1040.若希望当a的

95、值为奇数时,表达式的值为”真”,a的值为偶数时,表达式的值为”假”.则不能满足要求的表达式是( C ) A.a%2=1 B.!(a%2=0) C.!(a%2) D.a%241下面叙述正确的是（A）强制类型转换运算的优先级高于算术运算若a和b是整型变量，(a+b)+是合法的”A”*B是合法的A+B是合法的42以下程序段运行后变量a的值为（D）int x=6,y=5;int a;a=(-x=y+)?x:y+1;43.下面程序段的运行结果是( D )int a =5 b=6;printf (“%d”,a/b);A. 5 B. 6 C. 7 D. 044.以下程序的运行结果是( D )void mai

96、n()int a=65;char c=A;printf(“%x,%d”,a,c);A.65, B.41, C.65,65 D.41,65（3）选择结构程序设计1.C语言对于计嵌套语句的规定：else总是与（B）配对A.第一个if B.之前最近且尚未配对C.缩进位置相同的if D.之前最近的if2.以下的语句中，无内嵌的if语句是（D）A.if（x=y）x+=y； B.if（xyx！=y）x+=y；C.if（x！=y）scanf（“%d”，x）；else scanf （“%d”，y）； D.if（xy） x+;y+3、以下程序运行结果是（D）void main( ) int n=5; if (

97、n+=6 ) printf( “% dn” , n); else printf ( “%dn” , +n );A、4 B、5 C、6 D、74.以下程序段运行后的值为（B）int a=1,2,3,b=4,2,5;int *p,*q;int i,x;p=a;q=b;for(i=0;i<3;i+) if(*(p+i)=*(q+i) x=*(p+i)*2;不确定5.若有定义:int a=1,b=2,c=3;则执行以下程序后a,b,c的值分别为( D )if(ab) c=a,a=b,b=c;A.a=1 b=2, c=3 B.a=2 b=3 c=1 C.a=2 b=3 c=3 D.a=1 b=1,

98、c=16.以下程序的运行结果是（C）void main ( ) int n=e；switch (n- -)default: printf (“error”);casea：caseb: printf(“good”); break;casec: printf(“pass”);cased: printf(“warn”);A、error B、good C、error good D、warn（4）循环控制1.对于整型变量x，与while（！x）等价的是（B）A.while（x！=0） B.while（x=0） C.while（x！=1） D.while（x）2.以下程序运行后，循环体运行的次数为（ B

99、）int i=10,x;for( ;i<10;i+) x=x+i;A10B0C1D无限3.设有整型变量x，下述语句（ B ）不会出现死循环A、for( ; ; x+=1); B、for(; (x=getchar( )!=n; );C、while (1) x+; D、for(x=10; ; x-);4、在C语言中while循环和dowhile循环的主要区别是（ B ）A、dowhile 循环体内可以使用break语句， while循环体内不能使用break语句B、dowhile的循环至少无条件执行一次，while的循环体不是C、dowhile 循环体内可以使用continue语句，whil

100、e循环体内不能使用continue语句D、while的循环体至少无条件执行一次，dowhile的循环体不是5、对于整型变量x和y，语句for (x=0, y=0 ; (y!=123) (x<4); x+) y+;中的“y+;”被执行（ A ）A、4次 B、0次 C、123次 D、3次6以下程序段运行后变量n的值为（ D ）int i=1,n=1;for( ; i<3;i+) continue; n=n+i; 7设有如下程序段：int a33=1,0,2,1,0,2,1,0,1,i,j,s=0; for(i=0;i<3;i+) for(j=0;j<i;j+) s=s+ai

101、j;则执行该程序段后，s的值是（ C ） 8. 以下程序运行结果（C）void main() int sum=0,item=0; while（item5 item+; sum+=item;if(sum=6) break;printf(“%dn”,sum) ;A.10 B.15 C.6 D.79.下面程序运行结果是( A )int i=0,a =1,2,3,4,5;doai+=10;while(a+i2);for(i=0;i<5;i+)printf(“%d”,ai);A.11 2 3 4 5 B.1 2 3 4 5 C.11 12 13 14 15 D.11 12 3 4 510.若有定义

102、:int i=0,x=0; int a33=1,2,3,4,5,6,7,8,9则以下程序段运行后x的值为( C ) for( ;i3;i+) x+=ai2-i；A.0 B.12 C.15 D.1811.以下程序的运行结果是( B )void main()int sum=0,item=0;while (item5)item+;sum+=item;if(sum=5) break;printf(“%dn”,sum);A. 10 B.15 C.5 D.612.下面程序段的运行结果是( D )int i=O, a=3,4,5,4,3;doai+;while(a+i5);for(i=0;i5;i+)pri

103、ntf(“%d”,ai) ;A. 45654 B.34543 C.45554 D.4554313.下面程序段的运行结果是( C )int i=0,a=7,5,7,3,8,3;doai+=2;while(a+i5);for(i=0;i6;i+)printf(“%d ”,ai);A. 9 7 9 5 10 5 B.9 5 9 3 10 3 C. 9 5 7 3 8 3 D.7 5 7 3 8 3（5）数组1、有如下定义 int a 3=1，2，3，4，5，6，7，8，；则数组a的行数（ B ）A、 2 B、 3 C、 4 D、无法确定2.以下数组定义中，正确的是（ B ）A.int a2 3=1，

104、2，3，4，5，6，7； B.int a =1，2，3，4，5，6，7，8，9；C.int a2 =1，2，3，4，5，6； D.int a 4=6；3.若有定义:int a=6,b=2;ch1ar C1=a，C2=b；则表达式a+b%5+C2-C1的值是（ C ）A .7 B.8 C.9 D表达式错误4.若有定义：char str6=“abcdm”，*ps，*str2=“abcdef”；正确的是（ B ）A.stycpy（str1，str2）； B.表达式strcmp（str1，str2）的值0C.str1=str2； D.表达式strlen（str1）的值为65.以下能对一维数组a进行正确

105、初始化的语句是（ D ）A.int a5=（0，0，0，0，0，） B.int a5=0 C.int a5=1，2，3，4，5，6，7 D.int a=06.以下( A )是不正确的字符串常量A.abc B.“1212” C.“O” D“ ”7.设有如下定义：char str8=“Fujian”；则分配给数组str的存储空间是（C）字节A.6 B.7 C.8 D.98.下列数组定义中,正确的是( A )A.int a10 B.int n=10 an; C.int N=10;int aN; D.int n; scant(“%d”,n);int an9.若有定义int a23;则对数组元素的非法引

106、用是( D )A.a01/2 B.a11 C.a4-40 D.a0310.若有int a=2 则a=strcmp(“miss”,“miss”)运行后a的值为（B）A.1 B.0 C.-1. D.211.以下程序结束后屏幕输出（B）char str=“abcd”;printf(“%d”,strlen(str);A.4. B.5 C.6 D.712.已知int a10；则对a数组元素引用不正确的是（ A ）Aa10Ba3+5Ca10-10Da5 13.设有以下变量定义：char str1=”string”,str28,*str3,*str4=”string”;则（ A ）是正确的Astrcpy(str1,”china”)； Bstr2=”china”；Cstrcpy(*str3,”china”)；Dstrcpy(str40,”china”)；14、以下能对一维数组a进行正确初始化的语句是（ D ）A、int a5=(0, 0, 0, 0, 0); B、int a s=0;C、int a5=1, 2, 3, 4, 5, 6, 7 ; D、int a = 0;15. 若有定义int a 3 =1,2,3,4,5,6,7,8,9;则表达式sizeof(a)/sizeof(a0)的值为( A )A、3 B、4 C、5 D、916、下列数组定义中，正确的是（ A ）A. int a5