试题与答案

函数ReadDat()实现从文件IN.DAT中读取一篇英文文章存入到字符串数组xx中

题型:多项选择题

题目:

函数ReadDat()实现从文件IN.DAT中读取一篇英文文章存入到字符串数组xx中;请编制函数CharConvA(),其函数的功能是:以该文章中的行为单位把字符串中的最后一个字符的ASCⅡ值右移4位二进制位,高位补0后加最后第二个字符的ASCⅡ值,得到最后一个新的值,最后第二个字符的ASCⅡ值右移4位二进制位,高位补0后加最后第三个字符的ASCⅡ值,得到最后第二个新的值,依次类推一直处理到第二个字符。注意:第一个新的值与上述处理不同,第一个字符的ASCⅡ值加原最后一个字符的ASCⅡ值,得到第一个新的值。得到的新值分别存放在原字符串对应的位置上,之后把已处理的字符串仍按行重新存入数组xx中。最后main()函数调用函数WriteDat()把结果XX输出到OUT.DAT文件中。原始数据文件存放的格式是:每行的宽度均小于80个字符,含标点符号和空格,并也按它的ASCⅡ值作以上处理。
注意:部分源程序存放在PROG1.C中。请勿改动主函数main()、读数据函数ReadDat()和输出数据函数WriteDat()的内容。
[试题程序]
#include
#include
char XX[50][80];
int maxline=0;/*文章的总行数*/
int ReadDaf(void);
void WriteDat(void);
void CharConvA(void)


void main()

if(ReadDat())
prinff(“数据文件IN.DAT不能打开!\n\007”);
return;

CharConvA();
WriteDat();

int ReadDat(void)

FILE *fp;
int i=0;
char *p;
if((fp=fopen("in.dat","r"))==NULL)
return 1;
while(fgets(xx[i],80,fp)!=NULL)
p=strchr(xx[i],’\n’);
if(p) *p=0;
i++;

maxline=i;
fclose(fp);
return 0;

void WriteDat(void)

FILE *fp;
int i;
fp=fopen("out.dat","w");
for(i=0;i<maxline;i++)(
printf("%s\n",xx[i]);
fprintf(fp,"%s\n",xx[i]);

fclose(fp);

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0503/bf5c0310012be23abe5623cf4d1cc4be.html

下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D, E

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题型:单项选择题

Motherhood may make women smarter and may help prevent dementia in old age by bathing the brain in protective hormones, US reseachers reported on Thursday.
Tests on rats show that those who raise two or more litters of pups do considerably better in tests of memory and skills than rats who have no babies, and their brains show changes that suggest they may be protected against diseases such as Alzheimer’s. University of Richmond psychology professor Craig Kinsley believes his findings will translate into humans.
"Our research shows that the hormones of pregnancy are protecting the brain, including estrogen, which we know has many neuroprotective effects, " Kinsley said.
"It’s rat data but humans are mammals just like these animals are mammals, " he added in a telephone interview. "They go through pregnancy and hormonal changes. "
Kinsley said he hoped public health officials and researchers will look to see if having had children protects a woman from Alzheimer’s and other forms of age-related brain decline.
"When people think about pregnancy, they think about what happens to babies and the mother from the neck down, " said Kinsley, who presented his findings to the annual meeting of the Society of Neuroscience in Orlando, Florida.
"They do not realize that hormones are washing on the brain. If you look at female animals who have never gone through pregnancy, they act differently toward young. But if she goes through pregnancy, she will sacrifice her life for her infant—that is a great change in her behavior that showed in genetic alterations to the brain. \

How do scientists know "motherhood may make women smarter"

A. Some researchers have told them.
B. Many women say so.
C. They know it by experimenting on rats.
D. They know it through their own experience.

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