模拟上机试题库.doc

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1、试卷一改错题#includevoidmain(){intx,n;scanf("%d",&x);n=1;/*$ERROR1$*/if(x<=0

2、

3、x>=10000)printf("DataError!");else{if(x<=10)/*$ERROR2$*/n=1;elseif(x<100)n=2;elseif(x<1000)n=3;n=4;/*$ERROR3$*/}printf("n=%d",n);}参考答案：ERROR1：n=0;ERROR2：if(x<10);ERROR3：elsen=4;其他参考答案略。填空题#in

4、cludevoidmain(){22inti,max1,max2,a[10];for(i=0;i<10;i++)scanf("%d",___);/*$BLANK1$*/max1=max2=___;/*$BLANK2$*/for(i=1;i<10;i++)if(max1

5、a[0]或*(a+0)BLANK3：max1其它参考答案略。编程题#includePRINT(floatf){FILE*out;if((out=fopen("C:\24000101\RESULT.TXT","w+"))!=NULL)fprintf(out,"s=%f",f);fclose(out);}voidmain(){PRINT(s);}参考答案1：#includePRINT(floatf)22{FILE*out;if((out=fopen("result.txt","w+"))!=NULL)fprin

6、tf(out,"s=%f",f);fclose(out);}voidmain(){inti,j;doubles=0,s1;for(i=1;i<=10;i++){s1=1;for(j=1;j<=i;j++)s1=s1*j/(2*j+1);if(i%2)s+=s1;elses-=s1;}printf("s=%f",s);PRINT(s);}参考答案2：#includePRINT(floatf){FILE*out;if((out=fopen("result.txt","w+"))!=NULL)fprintf(out,"s=%f",

7、f);fclose(out);}voidmain(){inti;doubles=0,s1=1;for(i=1;i<=10;i++){s1=s1*i/(2*i+1);if(i%2)s+=s1;elses-=s1;}printf("s=%f",s);22PRINT(s);}运行结果：s=0.239569试卷二改错题#include#include#defineEPS0.00006voidmain(){longi;intsing;doubles,t;i=1;s=1;/*$ERROR1$*/sing=1;t=1;wh

8、ile(fabs(t)=EPS)ERROR3：i=i+2;其他参考答案略。填空题#includevoidmain(){inti,a1,a2,s;22___/*$BLANK1$*/for(i=1;i___100;i++)/*$BLANK2$*/{a1=i%10;a2=i/10;if(i%3=

9、=0)if((a1==5)___(a2==5))/*$BLANK3$*/s+=i;}printf("%d",s);}参考答案：BLANK1：s=0;BLANK2：

10、

11、其它参考答案略。编程题#includePRINT(ints){FILE*out;if((out=fopen("C:\24000102\RESULT.TXT","w+"))!=NULL)fprintf(out,"s=%d",s);fclose(out);}voidmain(){PRINT(s);}参考答案：#includePR

12、INT(ints){FILE*out;if((out=fopen("result.txt","w+"))!=NULL)fprintf(o