2015年趋势科技笔试A卷

题目原题来源：http://wenku.baidu.com/link?url=BHz9dr7Dbql5Ai0fTaUsi8QH-ieA9UAtw8kpf-Us_cGUnsz7ZIU1SfHIp33Cphcp0n6uPikWL6r8n0a0zQ0wNOMLGnXwxMd2uSHqv8-WJIe

35题：C

#include<iostream>
#include<vector>
#include<string>
#include<algorithm>
 
std::string foo(const std::string& s) {
    std::string ret;
    ret.reserve(s.size());
    for(size_ti=0;i<s.size();++i) {
        ret.push_back(s[i]|0x20);
    }
    return ret;
}
bool compare_string(const std::string& lhs,const std::string &rhs) {
    returnfoo(lhs)<foo(rhs);
}
int main(int argc,constchar* argv[])
{
    constchar* data[]={"Have","fun","in","Trendmicro"};
    std::vector<std::string>vec(data,data+sizeof(data)/sizeof(data[0]));
    std::sort(vec.begin(),vec.end(),compare_string);
    std::copy(vec.begin(),vec.end(),std::ostream_iterator<std::string>(std::cout," "));
    std::cout<<std::endl;
    return 0;
}

34：BDE(下面是改动后的代码）

#include<stdio.h>
#include<exception>
#include<stdlib.h>
 
template<unsigned int size>
class CTestObj
    {
    private:
        int *m_pvalue;
    public:
        CTestObj(int arr[size])
            {
            m_pvalue=new int;
            *m_pvalue=0;
            for(unsigned int i=0;i<size;i++)
                {
                *m_pvalue+=arr[i];
                }
            }
        ~CTestObj()
            {
            delete m_pvalue;
            }
        voidTest()
            {
            if(*m_pvalue>100)
                {
                throw std::exception();
                }
            }
    };
 
int main(int argc,const char* argv[])
{
    try
        {
        int arr[]={1,2,3,4,500};
        CTestObj<_countof(arr)> *pobj =new CTestObj<_countof(arr)>(arr);
        pobj->Test();
        delete pobj;
        }
    catch(std::exception)
        {
        printf("exception
");
  //    delete pobj;
        }
    printf("end
");
    return 0;
}

9：A（供參考）

#include<stdio.h>
#include<iostream>
usingnamespace std;
 
#define BUFFER_SIZE 12
/*void Copydata(const char *imgdata,int width,int height)
{
    charbuf[BUFFER_SIZE];
   if(width*height>BUFFER_SIZE) return;
    const char*p=imgdata;
    for(inti=0;i<width;++i){
        for(intj=0;j<height;++j){
           buf[i*width+j]=*p++;
        }
    }
   cout<<buf<<endl;
}
void Copydata(const char *data,int len)
{
   if(len>BUFFER_SIZE) return;
    charbuf[BUFFER_SIZE];
   memcpy(buf,data,len);
   cout<<buf<<endl;
}*/
void Copydata(const char *imgdata,int width,int height)
{
    char *buf=(char *)malloc(width*height);
    if(NULL==buf)return;
    memcpy(buf,imgdata,width*height);
    cout<<buf<<endl;
    free(buf);
}
int main(int argc,const char* argv[])
{
    char *p="abcdefghijkl";
    Copydata(p,3,4);
    return 0;
}

8：BC

#include<stdio.h>
#include<iostream>
usingnamespace std;
 
int main(int argc,constchar* argv[])
{
    intarr[3][3]={{1,2,3},{4,5,6},{7,8,9}};
    inti=1,j=2;
    cout<<**(arr+3*i+j)<<endl;
    cout<<*(*(arr+i)+j)<<endl;
    cout<<*(arr[i]+j)<<endl;
    cout<<*(arr+3*i+j)<<endl;
    return 0;
}

7：A

#include<stdio.h>
#include<iostream>
using namespace std;
void check()
{
    unsigned int i=1;
//    char *cptr =(char *)i;
    char *cptr= (char *)&i;
//    char*cptr=&(char *)i;
//    char cptr =(char)&i;
    if(*cptr!=0)
        printf("1");
    else
        printf("0");
}
int main(int argc,const char* argv[])
{
    check();
    return 0;
}

6：BC

#include <stdio.h>
#include <iostream>
using namespace std;
void f(char *s,char *t)
{
    do{
        *s++=*t++;
    }while(*t!='');
	*s='';
//    cout<<s<<endl;
}
void f(char *s,char *t)
{
    while(*t){
        *s++=*t++;
    }
    *s='';
   cout<<s<<endl;
}   
void f(char *s,char *t)
{
    do
    {
        *s=*t;
        s++;
    }while(*t++);
//   cout<<s<<endl;
}
void f(char *s,char *t)
{
    unsigned i;
    for(i=0;i<strlen(t);i++)
        s[i]=t[i];
    s[i]='';
}
int main(int argc,const char* argv[])
{
    char *t="abcde";
    char *s=(char *)malloc(10);
    f(s,t);
	cout<<s<<endl;
    return 0;
}
 

4：D

//假设基类对象指向子类对象的话 ，而且此函数是虚函数的时候。基类对象调用子类中定义的此函数。
#include<stdio.h>
#include<iostream>
usingnamespace std;
 
class Base{
    int x;
public:
    Base(){x=1;}
    virtualvoid display(){
        cout<<x;
    }
    void show(){
        cout<<x;
    }
};
class Derived:public Base{
    int y;
public:
    Derived(){y=2;}
    voiddisplay() {
        cout<<y;
    }
    void show(){
        cout<<y;
    }
};
int main()
{
    Base b;
    Derived d;
    b.display();
    d.display();
    Base *p=&d;
    p->display();
    b.show();
    d.show();
    p->show();
    return 0;
}