在线笔试题目解答

1.a.POINT *p;
b.POINT **p;
c.POINT p[16];
d.POINT **p;
e.POINT *p = new POINT[16];

2.

#include <iostream>


using namespace std;




//判断是否为偶数的函数


//是偶数，则返回1，否则返回0


int isEven(int n)




...{




/**//*if(n%2==0)


return 1;


else


return 0;


*/


//采用位运算，速度很快~！


if(n&1)


return 0;


else


return 1;


}




void main()




...{


int i,j;


cin>>i;


j = isEven(i);


if(j)


cout<<i<<" 是偶数"<<endl;


else


cout<<i<<" 是奇数"<<endl;


getchar();


}



3.


#include <iostream>


#include <string>


using namespace std;






/**//*


*思路：遍历字符串得到数字的第一个出现的位置firstNum


* 遍历字符串然后将字母出现在firstNum之后的插入到firstNum之前


* 遍历字符串得到数字的最后一个出现的位置lastNum


* 倒序遍历字符串然后将字符出现在lastNum之前的插入到lastNum之后


*/




int strlength(char *pstr)




...{


int k =0 ;


while(true)




...{


//遇到终结符则退出


if(pstr[k] == '

4.


#include <iostream>


using namespace std;






void parseBary(int n)




...{


int i=0;


int a[100];


while(true)




...{


if(n==0)


break;


a[i] = n%2;


n = n/2;


i++;


}


int temp[10];


int count[10];


for(int k=0;k<10;k++)




...{


count[k]=1;


}


//计数器


int x = 0;


for(int j=0;j<i;j++)




...{


if(a[j]==a[j+1])




...{


count[x]++;


}


else




...{


temp[x] = a[j];


x++;


}


}


for(int z=0;z<x;z++)




...{


cout<<temp[z]<<": "<<count[z]<<endl;


}


}




void main()




...{


cout<<"请输入您要验证的十进制数字:";


int a;


cin>>a;


cout<<"结果如下:"<<endl;


parseBary(a);


}

5.


#include <iostream>


using namespace std;




class Student




...{


private:


char name[20];


int year;


int month;


int day;


public:


Student();


Student(char *n,int y,int m,int d);


Student(Student &s);


~Student();


Student &operator > (Student &s);


void display()




...{


cout<<"姓名:"<<name<<endl


<<"生日:"<<day<<"/"<<month<<"/"<<year<<endl;


}




};




Student::Student()




...{


strcpy(name,"zcg");


this->year = 1984;


this->month = 8;


this->day = 21;


}




Student::Student(Student &s)




...{


strcpy(name,s.name);


year = s.year;


month = s.month;


day = s.day;


}




Student::Student(char *n,int y,int m,int d)




...{


strcpy(name,n);


this->year = y;


this->month = m;


this->day = d;


}




Student::~Student()




...{




}




Student & Student::operator >(Student &s)




...{


if(this->year>s.year)


return s;


else if(this->year<s.year)


return *this;


else if(this->month>s.month)


return s;


else if(this->month<s.month)


return *this;


else if(this->day>s.day)


return s;


else


return *this;




}




void main()




...{


Student s1("test1",1985,2,20);


Student s2("test2",1985,3,8);


Student s = s1>s2;


cout<<"年龄大的是: "<<endl;


s.display();


getchar();


}



6.


#include <....>


.....


.....






/**//*


*HANDLE FindFirst(char* lpFileName);//用于查找给定目录下是否有指定文件。若无则返回0，若有则返回一个句柄。例如：FindFirst（"D:/data/*.txt"）


*BOOL FindNext(HANDLE hFindFile); //继续查找该目录下是否有其他匹配文件。


*BOOL FindClose(HANDLE hFindFile);//用于结束查找。


*/




int NumOfPicFiles(char*lpszfolder);




main()




...{


int jpg = NumOfPicFiles("D:/*.JPG");


int bmp = NumOfPicFiles("D:/*.BMP");


cout<<"一共有 "<<jpg<<" 个JPG文件"<<endl;


cout<<"一共有 "<<bmp<<" 个BMP文件"<<endl;


}




int NumOfPicFiles(char*lpszfolder)




...{


int count = 0;


HANDLE handle = FindFirst(lpszfolder);


if(handle!=0)


return count;


else if(FindFirst(handle))




...{


count++;


}


FindClose(handle);


}