jj042519.htm

一些计算机二级考试题

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     &nbsp;&nbsp;&nbsp;&nbsp;{char strl[]=“How do you do”，*p1=strl；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;strcpy(strlstrlen(strl)/2，“es she”)；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;printf(“%s 、n”，pl)；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;}<br><br>&nbsp;&nbsp;&nbsp;&nbsp;(10)以下程序的功能是：从键盘上输入若干个学生的成绩，统计计算出平均成绩，并输出低于平均分的学生成绩，用输入负数结束输入。请填空。<br><br>&nbsp;&nbsp;&nbsp;&nbsp;main()<br><br>&nbsp;&nbsp;&nbsp;&nbsp;{float x[1000]，sum=0.0，ave，a；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;int n=0，i；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;printf(“Enter mark：、n”)；scanf(“%f”，&a)；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;while(a》=0.0&&n《1000)<br><br>&nbsp;&nbsp;&nbsp;&nbsp;{sum____10____；x[n]=_____11____；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;n；scanf(“%f”，&a)；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;}<br><br>&nbsp;&nbsp;&nbsp;&nbsp;ave=____12____；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;printf(“Output：、n”)；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;printf(“ave=%f、n”，ave)；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;for(i=0；i<br><br>&nbsp;&nbsp;&nbsp;&nbsp;main()<br><br>&nbsp;&nbsp;&nbsp;&nbsp;{FILE *fp；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;char ch，fname[32]；int count=0；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;printf(“Input the filename ：”)；scanf(“%s”，fname)；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;if((fp=fopen(____16____，“w”))==NULL)<br><br>&nbsp;&nbsp;&nbsp;&nbsp;{printf(“Can't open file：%s 、n”，fname)；exit(0)；}<br><br>&nbsp;&nbsp;&nbsp;&nbsp;printf(“Enter data：、n”)；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;while((ch=getchar())！=“#”){fputc(ch，fp)；count；}<br><br>&nbsp;&nbsp;&nbsp;&nbsp;fprintf(____17____，“、n%d、n”，count)；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;fclose(fp)；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;}<br><br>&nbsp;&nbsp;&nbsp;&nbsp;(13)以下函数creatlist用来建立一个带头节点的单链表，链表的结构如下图所示，新的结点总是插入在链表的末尾。链表的头指针作为函数值返回，链表最后一个节点的next域放入NULL，作为链表结束标志。data为字符型数据域，next为指针域。读入时字符以#表示输入结束(#不存入链表)。请填空。<br><br>&nbsp;&nbsp;&nbsp;&nbsp;struct node <br><br>&nbsp;&nbsp;&nbsp;&nbsp;{char data；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;struct node *next；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;}；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;。<br><br>&nbsp;&nbsp;&nbsp;&nbsp;。<br><br>&nbsp;&nbsp;&nbsp;&nbsp;。<br><br>&nbsp;&nbsp;&nbsp;&nbsp;_____18_____ creatlist()<br><br>&nbsp;&nbsp;&nbsp;&nbsp;{struct node *h，*s，*r；char ch；<br><br>      </font>
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     &nbsp;&nbsp;&nbsp;&nbsp;h=(struct node *)malloc(sizeof(struct node))；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;r=h；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;ch=getchar()；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;{s=(struct node *)malloc(sizeof(struct node))；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;s——》data=____19____；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;r——》next=s；r=s；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;ch=getchar()；}<br><br>&nbsp;&nbsp;&nbsp;&nbsp;r——》next=____20_____；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;return h；<br><br>&nbsp;&nbsp;&nbsp;&nbsp;}<br><br>
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