博文
c＋＋符号重载多盒子中最小体积盒子(2005-07-29 22:44:00)
摘要：#include<iostream>
#include<cstdlib>
#include<ctime>
using namespace std;
class box
{
public:
box(double alength=1.0,double abreadth=1.0,double aheight=1.0);
~box()
{
cout<<endl<<"constructor destroyed."<<endl;
}
double getvolume()const
{
return height*length*breadth;
}
double getlength()const
{
return length;
}
double getbreadth()const
{
return breadth;
}
double getheight()const
{
......
一道c＋＋竞赛题(2005-07-28 13:01:00)
摘要：已知n个整数 x1,x2,…..xn, 以及一个整数k (k<n)。从 n 个整数中任选k个整数组合相加，可分别得到一系列的和。例如当 n=4, k=3，4个整数分别为3，7，12，19 时，可得全部的组合为：
3+7+12=22 3+7+19=29
7+12+19=38 3+12+19=34。
现在，要求你计算出和为素数的组合数有多少种。例如上例，只有一种组合的和为素数：（3+7+19=29）。
输入：
n, k（1≤n≤20，k<n）
x1,x2,…xn（1≤xi≤5000000）
输出：
一个整数（满足条件的种数）
输入输出样例：
输入：
4 3
7 12 19
输出：
1
源程序：
#include<iostream>
#include<math.h>
const int N=21;
using namespace std;
int issushu(long num)
{
for(long i=2;i<=sqrt(num);i++)
if(num%i==0)
return 0;
return 1;
}
long totalsum(long a[],int n)
{
long sum=0;
for(int i=0;i<n;i++)
&n......
一个题目(c++)(2005-07-18 23:40:00)
摘要：在论坛上看到这样的题目:
任意一个正整数的立方都可以写成一串连续奇数和。例如：
13*13*13＝157+159+。。。。。。+179+181+183
这道题的算法是:任意输入的正整数的平方为x,那么一串连续奇数的第一个数应为x减去这个正整数减一,
按等差为2的数列直到x加上这个正整数减一.例如:如果输入为12,即求12的立方,
则应为:144-(12-1)=133,135,137,139.........144+(12-1)=155.
程序:
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int num;
cout<<"plese input the num:";
cin>>num;
int num2=pow(num,2);
int sum=num2-(num-1),sum2=num2+num-1;
cout<<endl<<"the result is:"<<endl;
cout<<num<<"*"<<num<<"*"<<num<<"="<<sum;
while(sum<=sum2)
{
sum+=2;
cout<<&......
n个数的最小公倍数(2005-07-18 23:15:00)
摘要：
#include<stdio.h>
#define N 3/*随意改变这个值实现n的变化*/
int yueshu[15];
int zuixiao(int b[],int count)
{
int i=0,small=32667;
for(;i<count;i++)
if(b[i]<b[0])
small=i;
if(small==32667)
return 0;
else
return small;
}
int xingma(int number,int i)
{
if(number%i==0)
return 1;
else
return 0;
}
int zdgyshu(int c[],int x,int num)
{
int i=0,k=0,j,data,count=0,dataelse=0;
for(i=2;i<=c[num];i++)
if(xingma(c[num],i))
{
yueshu[k]=i;
k++;
}
for(i=0;i<k;i++)
{
data=c[i];
for(j=0;j<x;j++)
{
if(j==num)
continue;
else
{
if(xingma(c[j],data))
count++;
}
}
if(count==x-1)
dataelse=data;
}
if(dataelse!=0)
return dataelse;
else
return 0;
}
main()
{
int array[N],i,public_mnum,public_mtime,smallest,sum=1;
clrscr();
printf("please input %d numbers:",N);
for(i=0;i<N;i++)
scanf("%d",&array[i]);
smallest=zuixiao(array,N);
public_mnum=zdgyshu(array,N,smallest);
if(public_mnum==0)
{
for(i=0;i<N;i++)
sum*=array[i];
printf("\nthe public_mtime num is:%d",su......
C++(类的静态成员运用)(2005-07-15 12:07:00)
摘要：#include<iostream>
using namespace std;
class Box
{
public:
Box();
Box(double lengthvalue,double breadthvalue,double heightvalue);
double volume()const;
int comparevolume(const Box& otherbox)const;
int getobjectcount()const {return objectcount;}
private:
static int objectcount;
double length;
double breadth;
double height;
};
Box::Box()
{
cout<<endl<<"Default constructor called"<<endl;
++objectcount;
length=breadth=height=1;
}
Box::Box(double lengthvalue,double breadthvalue,double heightvalue):length(lengthvalue),
breadth(breadthvalue),height(heightvalue)
{
cout<<endl
<<"constructor called"
<<endl;
++objectcount;
if(length<=0)
length=1......
c++(类大小的测定)(2005-07-14 16:32:00)
摘要：
#include<iostream>
using namespace std;
class SizeBox
{
public:
SizeBox();
int totalSize();
private:
char* pMaterial;
double length;
double breadth;
double height;
};
SizeBox::SizeBox():length(1.0),breadth(1.0),height(1.0),pMaterial("Cardboard")
{cout<<endl<<"Default constrcutor called"<<endl;
}
int SizeBox::totalSize()
{
return sizeof(length)+sizeof(breadth)+sizeof(height)+sizeof(pMaterial);
}
int main()
{
SizeBox box;
SizeBox boxes[10];
cout<<endl<<"The data numbers of a box occupy"<<box.totalSize()<<"bytes.";
cout<<endl<<"A singal box object occupies"<<sizeof SizeBox<<"bytes.";
cout<<endl<<"An array f 10 Box objects occupies"<<sizeof(boxes)<<&......
c++(面向对象关于类的盒子问题)(2005-07-13 23:04:00)
摘要：#include<iostream>
using namespace std;
class Box
{
public:
Box(double lengthvalue=1.0,double breadthvalue=1.0,double heightvalue=1.0);
double volume();
int comparevolume(Box& otherbox);
private:
double length;
double breadth;
double height;
};
Box::Box(double lengthvalue,double breadthvalue,double heightvalue):length(lengthvalue),
breadth(breadthvalue),height(heightvalue)
{
cout<<endl
<<"constructor called"
<<endl;
length=lengthvalue;
breadth=breadthvalue;
height=heightvalue;
}
double Box::volume()
{
return length*height*breadth;
}
int Box::comparevolume(Box& otherbox)
{
if(otherbox.v......
c++(最大公约数和最小公倍数)(2005-07-12 13:27:00)
摘要：#include<iostream>
using namespace std;
int main()
{
int m=0,n=0;
cout<<endl
<<"请输入两个数(整型,从小到大):";
cin>>n>>m;
while(n>m)
{
cout<<endl
<<"输入格式错误,请重新输入.:";
cin>>n>>m;
}
int m1=m;
int n1=n;
int i=m%n;
while(i!=0)
{
m=n;
n=i;
i=m%n;
}
cout<<endl
&nb......
c++(冒泡排序)(2005-07-12 12:35:00)
摘要：#include<iostream>
#define swap(x,y,t)((t)=(x),(x)=(y),(y)=(t))
using namespace std;
const int N=10;
void sort(int b[],int count);
int main()
{
int a[N];
cout<<endl
<<"please input the "<<N<<"numbers:"<<endl;
for(int i=0;i<N;i++)
cin>>a[i];
cout<<endl
<<"the original numbers you have inputed are: "<<endl;
for(i=0;i<N;i++)
cout<<" "<<a[i];
cout<<endl
<<"After sorting the numbers ,the numbers are:"<<endl;
sort(a,N);
return 0;
}
void sort(int b[......
c++(模板和重载)(2005-07-10 15:28:00)
摘要：#include<iostream>
#include<iomanip>
using namespace std;
template <class T> T larger(T a,T b);
template<>long* larger<long*>(long* a,long* b);
template<class T>T larger(const T array[],int count);
template<class TReturn,class TArg>TReturn larger(TArg a,TArg b);
int main()
{
cout<<endl;
cout<<"the larger between 1.2 and 3.5 is:"<<larger(1.2,3.5)<<endl;
int value=25;
int value1=21;
cout<<"the larger between"<<value<<"and"<<value1<<"is:"<<larger(value,value1)<<endl;
long value3=35;
long value4=25;
cout<<"the larger between"<<value3<<"and"<<value4<<"is:"<<larger(value3,value4)<<endl;
......