福建省高等学校计算机等级考试(二级C语言)选择题试题库

第二部分：改错题（每题10分）第一套卷：cmody011.c#include <math.h>#include <stdio.h>#include <string.h>#include <conio.h>void main(){ char str1[100], t[200];int i, j;/**/ i = 0; /**/ j=0clrscr();strcpy(str1, "4AZ18c?Ge9a0z!");for (i = 0; i<strlen(str1); i++){/**/ if ((str1[i] %2== 0) && (i%2!=0)) /**/ if ((str1[i] %2== 0) && (i%2==0)) {t[j] = str1[i];j++;}}t[j] = '\0';printf("\n Original string: %s\n", str1);printf("\n Result string: %s\n", t);}************************************************************************* cmody012.c#include <string.h>#include <conio.h>#include <math.h>#include <stdio.h>#define M 50double fun(int n){ double y = 0.0;int i,j;j=0;for(i=1;;i++){/**/ if((i<10)&&(i%3==0)) /**/if((i>10)&&(i%3==0))(根据题义) {/**/ y+=1/i; /**/ y+=1.0/i;j++;}if(j==n) break;}return y;}void main(){ clrscr();printf("fun(8) = %8.3lf\n", fun(8));}************************************************************************* 第二套卷************************************************************************* cmody021.c#include <stdio.h>void main(){/**/ int i; j; /**/ int i, j;(概念错误)for (i=1;i<=5;i++){for (j=1;j<=10-2*i;j++) printf(" ");/**/ for (j=1;j<=5;j++) /**/ for (j=1;j<=2*i-1;j++) *号的位置printf("* ");printf("\n");}}cmody022.c#include <stdio.h>#include <conio.h>/**/int fun();/**/ int fun()(概念错误){ int hen,cock,chicken,n=0;clrscr();for(cock=0;cock<=50;cock+=1)for(hen=0;hen<=100;hen=hen+1){ chicken=2*(100-hen-2*cock);/**/ if(cock+hen+chicken=100) /**/if(cock+hen+chicken==100) if后面关系表达式{ n++;printf("%d-->hen:%d,cock:%d,chicken:%d\n",n,hen,cock,chicken);if(n==20) getch(); }}return n;}void main(){ int num;num=fun();printf("\n There are %d solutions.\n",num);getch(); }第三套卷**************************************************************************** cmody031.c#include <stdio.h>#include <conio.h>void main(){ int m,n,result,flag=0;/**/ char ch, /**/ char ch;(概念错误)clrscr();printf("Input an expression: ");scanf("%d%c%d",&m,&ch,&n);/**/ switch ch /**/ switch (ch){ case '+': result=m+n; break;case '-': result=m-n; break;case '*': result=m*n; break;case '%': result=m%n; break;case '/': result=m/n; break;default: { printf("Error!\n"); flag=1; }}if (!flag) printf("%d %c %d = %d\n",m,ch,n,result);getch();}**************************************************************************** cmody032.c#include <stdio.h>#include <math.h>void main(){ int num;printf("\n");num=fun();printf("\nThe total of prime is %d",num);getch(); }int fun(){ int m,i,k,n=0;for(m=201; m<=300;m+=2){ k=sqrt(m+1);for(i=2;i<=k;i++)/**/ if(m/i==0) /**/ if(m%i==0)break;/**/ if(i==k) /**/ if(i>=k){ printf("%-4d",m);n++;;if(n%10==0) printf("\n");}}return n;}模拟卷**************************************************************************** evsum.c#include <stdio.h>void main(){/**/ int sum=1,i; /**/ int sum=0,ifor(i=100; i>1; i--)/**/ if(i%2=0) sum+=i; /**/ if(i%2==0) sum+=i;printf("%d\n",sum);}*************************************************************************** dafsum.c#include <stdio.h>void main(){ int i,a,b,c;/**/ for(i=100;i=999;i++) /**/ for(i=100;i<=999;i++){ a=i/100;/**/ b=i%10/10; /**/ b=i/10%10;c=i%10;/**/ if i==a*a*a+b*b*b+c*c*c /**/ if(i==a*a*a+b*b*b+c*c*c)printf("%5d",i);}}****************************************************************************第三部分：填空题（每题10分）第一套卷*************************************************************************** ccon011.c#include <stdio.h>#include <math.h>void main(){int x;/**/ float f ; /**/printf("Input an integer: ");scanf("%d",&x);f = /**/(fabs(x)-2)/(x*x+1) /**/ ;printf("F(x)=%f\n",f);}************************************************************************** ccon012.c#include <stdio.h>void main(){ double pi=0;long i, sign=1;for(i=1;i<=10001;i+=2){pi+=1.0*sign/i;sign=/**/ -sign; /**/; 题义中是正负交替的}pi*=/**/ 4 /**/; 前面一个系数printf("%f\n",pi);}*************************************************************************** ccon013.c#include <stdio.h>#include <stdlib.h>void find_max_min(int *p,int n){int *q;max=min=*p;for(q=p; q</**/ p+num /**/; q++) 指针从p开始,向下移动,直到结束p+num if(/**/ max<*q /**/ ) max=*q; 从下列语句可以推出该式子else if(min>*q) min=*q;}void main(){int i,num[10];printf("Input 10 numbers: ");for(i=0;i<10;i++) scanf("%d",&num[i]);find_max_min(/**/ num /**/,10); 将主函数中的数组值[指针]传递给子函数printf("max=%d,num=%d\n",max,min);}第二套卷*************************************************************************** ccon021.c#include <stdio.h>void main(){int a,b,k;int plu = /**/ 403 /**/;根据题义for(a=1; a<10; a++)for(b=1; b<10; b++){k = (a*10+b) * /**/(b*10+a ) /**/ ; 根据题义表达式if(k==plu) printf("A = %d, B = %d\n",a,b);}}*************************************************************************** ccon022.c#include <stdio.h>void main(){int n,a,b;/**//**/scanf("%d",&n);while(/**/ n /**/){if(n>0) a++;else /**/ b++; /**/scanf("%d",&n);}printf("Positive integer: %d, negative integer: %d\n",a,b);}*************************************************************************** ccon023.c#include <stdio.h>#include <conio.h>int prime(int n){ int k,flag=1;for(k=2; k<=n/2+1; k++)if (n%k==0) { flag=/**/ 0 /**/ ; break;}return flag;}void main(){ int num, a;clrscr();do{ printf("Please input an even number:");scanf("%d", &num);}while(num<=6||num%2==1);for(a=2;a<=num/2+1;a++)if(prime(a) && prime(/**/( num-a) /**/))printf("\n %d = %d + %d ", num, a, num-a);}第三套卷**************************************************************************** ccon031.c#include <stdio.h>#include <math.h>/**/ main() /**/{ float x,x0,f,f1;x=1.5;do{ x0=x;f=((2*x0-4)*x0+3)*x0-6;f1=(6*x0-8)*x0+3;x=x0-f/f1;}/**/ while /**/(fabs(x-x0)>=1e-6);printf("the root is: %.2f\n",x);}**************************************************************************** ccon032.c#include <stdio.h>void main(){ char s[80];int i;printf("Please input a string: ");for(i=0;((s[i]=getchar())!='\n')&&(i<80);i++);s[i]='\0';for(i=0;s[i]!='\0';/**/ i++ /**/){if(s[i]>='a'&&s[i]<='z')s[i]=s[i]-32;else if(/**/ s[i]>='A'&&s[i]<='Z' /**/)s[i]=s[i]+32;printf("%c",s[i]);}}**************************************************************************** ccon033.c#include <stdio.h>float average(int *pa,int n){int k;/**/ float avg=0; /**/for(k=0;k<n;k++)avg = avg+/**/ pa/**/;avg = avg/n;return avg;}void main(){ int a[5]={20,30,45,64,23};float m;m=average(/**/ a /**/, 5);printf("A verage=%f\n",m);}模拟卷***************************************************************************** calfun.c#include <stdio.h>#include <math.h>void main(){int x;/**/ float f; /**/printf("Input an integer: ");scanf("%d",&x);f = /**/ (abs(x)-2.0)/(x*x+1.0) /**/ ;printf("F(x)=%f\n",f);getch();}******************************************************************************* intsum.c#include <stdio.h>void main(){int n,a,b;/**/a=0; b=0;/**/scanf("%d",&n);while(/**/n /**/){if(n%2==0) a+=n;/**/ else b+=n /**/scanf("%d",&n);}printf("Sum of even number: %d, Sum of odd number: %d\n",a,b);}******************************************************************************* fac.c#include <stdio.h>void main(){ int n,i;double s,fac;/**/ s=0; fac=1; /**/scanf("%d",&n);for(i=1;i<=n;i++){fac=/**/ fac/i /**/;s=s+fac;}printf("%f\n",s);}*******************************************************************************第四部分：编程题（每题10分）第一套卷************************************************************************** cprog011.c#include <math.h>#include <stdio.h>double fun1(double x){ /**//**/}void main(){clrscr();printf("fun1(0.76) = %8.3lf\n", fun1(0.76));printf("fun1(3.00) = %8.3lf\n", fun1(3.00));printf("fun1(3.76) = %8.3lf\n", fun1(3.76));}************************************************************************** cprog012.c#include <string.h>#include <conio.h>#include <math.h>#include <stdio.h>int fun2(int a[],int n,int b[],int c[]){/**//**/}void main(){ int n = 10, i, nb;int aa[10] = {12, -10, -31, -18, -15, 50, 17, 15, -20, 20};int bb[10], cc[10];clrscr();printf("There are %2d elements in aa.\n", n);printf("They are: ");for(i=0; i<n; i++) printf("%6d", aa[i]);printf("\n");nb = fun2(aa, n, bb, cc);printf("Elements in bb are: ");for (i=0; i<nb; i++) printf("%6d", bb[i]);printf("\n");printf("Elements in cc are: ");for(i=0; i<nb; i++) printf("%6d", cc[i]);printf("\n");printf("There are %2d elements in bb.\n", nb);}第二套卷**************************************************************************** cporg021.c#include <math.h>#include <stdio.h>double fun1(double x){ /**//**/}void main(){clrscr();printf("fun1(0.76) = %8.3lf\n", fun1(0.76));printf("fun1(3.00) = %8.3lf\n", fun1(3.00));printf("fun1(3.76) = %8.3lf\n", fun1(3.76));}**************************************************************************** cprog022.c#include <string.h>#include <conio.h>#include <math.h>#include <stdio.h>void fun2(char a[],char b[],char c[]){/**//**/}void main(){ char str1[15]="Fuzhou",str2[15]="Fujian",str3[15]="China";clrscr();fun2(str1,str2,str3);printf("The ordered strings is : %s, %s, %s\n",str1,str2,str3);getch();}第三套卷**************************************************************************** cprog031.c#include <math.h>#include <stdio.h>double fun1(double x){/**//**/}void main(){clrscr();printf("fun1(0.76) = %8.3lf\n", fun1(0.76));printf("fun1(3.00) = %8.3lf\n", fun1(3.00));printf("fun1(3.76) = %8.3lf\n", fun1(3.76));}**************************************************************************** cprog032.c#include <stdio.h>int fun(char *s){ /**//**/}void main(){char str[255];gets(str);printf("%d\n",fun(str));}模拟卷******************************************************************************* section.c#include <stdio.h>void main(){ float x,y;printf("enter x:");scanf("%f",&x);/**/if(x<=1) y=x+5;else if(x<=10) y=2*x;else y=3/(x-10);/**/printf("x=%.2f,y=%.2f\n",x,y);}**************************************************************************** sort.c#include <stdio.h>void sort(int a[],int n){/**/k=i;for(j=i+1;j<n;j++)if(a[j]<a[k]) k=j;if(k!=i){t=a[i];a[i]=a[k];a[k]=t;}/**/}void main( ){ int a[10]={6,3,12,0,2,10},i;sort(a,6);printf("the sorted array a: \n");for(i=0;i<6;i++)printf("%4d",a[i]);printf("\n"); }。