C语言期末考试试卷附参考答案

一、单项选择题（请将答案填在下面表格中20×1）x=－{x=x*x;}while(!x);A.inta(20);B.inta[]={1,2,5,7,0};C.inta[n];D.inta[2]={1,2,4,6};8.在定义intb[2][10];之后，对b数组元素引用正确的是()。A.b[0][9]B.b[2,3]C.b(1)(5)D.b[10][0]9.如有定义语句intc[]={1,5,3,4,6,7,0};，则数组c有（）个元素。A.0B.不定C.6D.7A.s1={"China"};B.strcpy(s1,s2);C.s1=s2;D.strcpy(s2,s1);A.strlwrB.struprC.stringD.strlenfun(floatx){floaty;y=3*x-4;returny;}A.intB.floatC.voidD.不确定二、判断题（正确的打6.strcmp("Beijing"")三、填空题（10×2）puts()#include<stdio.h>voidmain()intfun(inta,b){intn1,n2,a;{intr,t;printf("pleaseinputn:1\n,n"2);if(a<b){t=a;b=a;a=t;}scanf("%d%",1,&n2);while(r!=0)printf("最大公约数是：%d\n",a);{a=b;b=r;r=a/b;}}returna;}}11.#include<stdio.h>2.#include<stdio.h>intmain(){voidfun(intx);{chars1[]="Thisbook";chars2[]="THISho;ok"fun(8);printf("\n");inti;}for(i=0;s1[i]!=0'&&s2[i]!=0';i++)voidfun(intx)if(s1[i]!=s2[i])printf(""%c,s1[i]);{if(x/2>0)fun(x/2);}printf("%d",x);}3.#include<stdio.h>intmain()3.#include<stdio.h>{if(i%2!=0)n++;for(j=1;j<=abs(i);j++)printf("");for(j=1;j<=11－abs(i)*2;j++)printf(""printf("\n");}}}{x=a[i];j=i-1;while(j>=0&&x<a[j]){a[j+1]=a[j];j――;}a[j+1]=x;}printf("排序后为：\n");for(i=0;i<=9;i++)printf("%5d",a[i]);#include<__①___>#include<stdio.h>intpsushu(___⑥____)intmain()｛inti;{intn,a[20],i=0,m=0;charhex[16]={'0','1','2','3','4','5','6','7',for(i=2;___⑦___;i++)'8','9','A','B','C','D','E','F'};if(m%i==0)return0;printf("请输入整数n：\n");return___⑧___;}scanf(___②____,&n);voidmain()while(n>0){inta,s;{a[i++]=n%16;printf("请输入整数：\n");n=____③___;}scanf("%d",⑨__);printf("转化为十六进制的数为：");s=psushu(a);if(__⑩__)printf("%d――n",a;)for(i=i―1;____④___;i素数)//倒序输出{m=a[i];elseprintf("%d不是素数\n",a);printf("__⑤___",hex[m]);}}printf("\n");}27.string.h\030.return#include<stdio.h>voidmain()Intbintfun(inta,b){intn1,n2,a;{intr,t;printf("pleaseinputn:1\n,n"2);if(a<b){t=