#include<iostream>
#include <cstdlib>
#include<string>
using namespace std;
void main()
{
int my_age=20;int RandomNumber=0;
string name="HanLonglong";
cout<<"My name is "<<name<<endl;
cout<<"I am"<<my_age<<"years old."<<endl;
int s=rand()%3+1;
cout<<"I guess"<<s<<endl;
}

#include<iostream>
#define const 0.0254
using namespace std;
int main()
{
double fool,inch;
cout<<"please enter height ,foot inch plese with a space:";
cin>>fool>>inch;
cout<<"the height is"<<fool*12*const+inch*const<<"mitres"<<endl;
return 0;
}

#include<iostream>using namespace std;int main(){ long code; cout<<"\a enter your code______\b\b\b\b\b\b"; cin>>code; cout<<"\ayour code is"<<code<<endl; return 0;}

归并排序
#include<iostream>
using namespace std;
void mergearray(int a[], int first, int mid, int last, int temp[])
{
int i = first, j = mid + 1;
int m = mid, n = last;
int k = 0;
while (i <= m && j <= n)
{
if (a[i] <= a[j])
temp[k++] = a[i++];
else
temp[k++] = a[j++];
}
while (i <= m) temp[k++] = a[i++];
while (j <= n)
temp[k++] = a[j++];
for (i = 0; i < k; i++)
a[first + i] = temp[i];
}
void mergesort(int a[], int first, int last, int temp[])
{ if (first < last)
{
int mid = (first + last) / 2;
mergesort(a, first, mid, temp); //左边有序
mergesort(a, mid + 1, last, temp); //右边有序
mergearray(a, first, mid, last, temp); //再将二个有序数列合并
}
}
bool MergeSort(int a[], int n)
{
int *p = new int[n];
if (p == NULL)
return false;
mergesort(a, 0, n - 1, p);
delete[] p;
return true;
}
void main()
{
int n, i;
int r[100];
cout<<"请输入要排列的数的个数：";
cin>>n;
for( i=0;i<n;i++)
cin>>r[i];
MergeSort(r,n);
for( i=0;i<n;i++)
cout<<r[i]<<" ";
}

m~n素数和
#include<iostream>
#include<cmath>
using namespace std;
void main()
{
int m,n,sum=0;
cout<<"hello!please input m and n.(m<=n):";
cin>>m>>n;
for(int i=m;i<=n;i++)
{
for(int j=2;j<=sqrt(i);j++)
if(i%j==0) break;
if(j>sqrt(i))
{
if(i!=1)
{cout<<i<<" ";
sum=sum+i;}
}
}
cout<<endl<<"m~n 之间素数和为:"<<sum<<endl;
}

四个数字组合两个数乘积等于这四个数字组成的四位数
#include<iostream>
using namespace std;
bool Funct(int number,int i,int j,int k,int m)
{
int a,b,c,d;
a=number/1000;b=(number-a*1000)/100;
c=(number-a*1000-b*100)/10;d=number-a*1000-b*100-c*10;
if((i==a||i==b||i==c||i==d)&&(j==a||j==b||j==c||j==d)&&(k==a||k==b||k==c||k==d)&&(m==a||m==b||m==c||m==d))
return true;
else return false;
}
void main()
{
int NumberOfTime=0;int number;
for(int i=0;i<=9;i++)
for(int j=0;j<=9;j++)
for(int k=0;k<=9;k++)
for(int m=0;m<=9;m++)
{
number=(i*100+j*10+k)*m;
if((i!=j&&i!=k&&i!=m&&j!=k&&j!=m&&k!=m)&&(number>=1000))
{
if(Funct(number,i,j,k,m)==true)
{
cout<<i*100+j*10+k<<"*"<<m<<"="<<number<<endl;
NumberOfTime++;
}
}
}
for( i=0;i<=9;i++)
for(int j=0;j<=9;j++)
for(int k=0;k<=9;k++)
for(int m=0;m<=9;m++)
{
number=(i*10+j)*(k*10+m);
if((i!=j&&i!=k&&i!=m&&j!=k&&j!=m&&k!=m)&&(number>=1000))
{
if(Funct(number,i,j,k,m)==true)
{
if((i*10+j)>=(k*10+m))
{
cout<<i*10+j<<"*"<<k*10+m<<"="<<number<<endl;
NumberOfTime++;
}
}
}
}
cout<<NumberOfTime;
}

随机数
#include <iostream>
#include <ctime>
#include <cmath>
using namespace std;
int main()
{
srand(time(0));
const int max = 28;
for (int i = 0; i < 20; i++) {
int temp = rand() % max + 1; // 结果是1到max(包括1与max)之间.
cout <<temp<<endl;
}
return 0;
}

矩阵
#include<iostream>
using namespace std;
int main()
{
int n,num=1;
static int arry[6][6]={0};
cout<<"请输入一个正整数n(n<=6):";
cin>>n;
for(int i=0;i<n;i++)
{ arry[0][i]=num;
num++;
}
for(i=1;i<n;i++)
{ arry[i][n-1]=num;
num++;
}
for(i=n-2;i>=0;i--)
{ arry[n-1][i]=num;
num++;
}
for(i=n-2;i>0;i--)
{ arry[i][0]=num;
num++;
}
for(i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{ cout<<arry[i][j]<<"\t";
}
cout<<endl;
}
return 0;
}

字符串中找大写字母
#include<iostream>
#include<string>
using namespace std;
int main()
{
const int Arsize=80;
char str[Arsize];
cout<<"Input string:";
cin.getline(str,Arsize);
for (int temp=0;temp<=strlen(str);temp++)
{
int n=1;
if(str[temp]>64&&str[temp]<91)
{
n--;
cout<<str[temp];
}
else if(n==0)
cout<<"NotFound";
}
return 0;
}

26进制 阿凡达 问题
#include "stdafx.h"
#include"iostream"
#include"string"
#include"cstring"
using namespace std;
int aFanda(char arry[])
{
int j=0,first,second;
first=int(arry[j])-65;
j++;
while(arry[j]!=' ')
{ first=first*26+int(arry[j])-65;
j++;
}
j++;
second=int(arry[j])-65;
j++;
while(j<strlen(arry))
{ second=second*26+int(arry[j])-65;
j++;
}
int sum=first+second;
return sum;
}
int covert(int sum)
{
int DaAn[20];int j;
DaAn[0]=sum;
for( j=0;DaAn[j]>26;j++)
DaAn[j]=sum/26;
DaAn[j]=sum%26;
for(int k=0;k<=j;k++)
{
cout<<char(DaAn[k]+65);
}
cout<<endl;
return 0;
}
int _tmain(int argc, _TCHAR* argv[])
{ char arry[20]="A";int sum[20];
int i=0,j=0;
cout<<"请输入问题:"<<endl;
while(strlen(arry)!=0)
{
cin.getline(arry,20);
sum[i]=aFanda(arry);
i++;
}
for(int k=0;k<i-1;k++)
covert(sum[k]);
return 0;
}

数字字符串转换
#include "stdafx.h"
#include"iostream"
using namespace std;
void str(int x)
{
char t[20];
int i=0;
if(x<10)
{ t[i]=x+'0';
i++;
}
else { t[i]=x%10+'0';
str(x/10);
i++;}
for(int j=i-1;j>=0;j--)
cout<<t[j];
}
int _tmain(int argc, _TCHAR* argv[])
{
int a;
cout<<"请输入一个整数："<<endl;
cin>>a;
str(a);
cout<<endl;
return 0;
}

#include<iostream>
using namespace std;
int NaVi(char zh[])
{
int j=0,first,second;
first=int(zh[j])-65;
j++;
while(zh[j]!=' ')
{
first=first*26+int(zh[j])-65;
j++;
}
j++;
second=int(zh[j])-65;
j++;
while(j<strlen(zh))
{
second=second*26+int(zh[j])-65;
j++;
}
int sum=first+second;
return sum;
}
int func(int sum)
{
int ZH[20];
int j;
ZH[0]=sum;
for( j=0;ZH[j]>26;j++)
ZH[j]=sum/26;
ZH[j]=sum%26;
//cout<<"输出结果"<<endl;
for(int k=0;k<=j;k++)
{
cout<<char(ZH[k]+65);
}
cout<<endl;
return 0;
}
int main()
{
char zh[20]="A";
int sum[20];
int i=0,j=0;
cout<<"请输入两个大写字母（按Enter可多行输入，双按Enter可输出结果）:"<<endl;
while(strlen(zh)!=0)
{
cin.getline(zh,20);
sum[i]=NaVi(zh);
i++;
}
for(int k=0;k<i-1;k++)
func(sum[k]);
return 0;
}

动态数组结构体
#include "stdafx.h"
#include"iostream"
#include"fstream"
#include"string"
const int Arsize=50;
using namespace std;
struct WeiHu
{
string name;
double money;
};
int _tmain(int argc, _TCHAR* argv[])
{
int renshu;bool p2[Arsize];
WeiHu *p=new WeiHu [Arsize];
cout<<"请输入捐款人数";
cin>>renshu;
for(int i=0;i<renshu;i++)
{
cout<<"请输入第"<<i+1<<"个捐款者的姓名和数目(中间用空格隔开)：";
cin>>p[i].name>>p[i].money;
if(p[i].money>=10000)
p2[i]=1;
else p2[i]=0;
}
cout<<"grand patrons"<<endl;
for(int i=0;i<renshu;i++)
{
if(p2[i]==1)
cout<<p[i].name<<" "<<p[i].money<<endl;
}
cout<<"patrons"<<endl;
for(int i=0;i<renshu;i++)
{
if(p2[i]==0)
cout<<p[i].name<<" "<<p[i].money<<endl;
}
return 0;
}

保存txt
#include "stdafx.h"
#include"iostream"
#include"fstream"
#include"string"
const int Arsize=50;
using namespace std;
struct WeiHu
{
string name;
double money;
};
int _tmain(int argc, _TCHAR* argv[])
{
int renshu;bool p2[Arsize];
WeiHu *p=new WeiHu [Arsize];
cout<<"请输入捐款人数";
cin>>renshu;
for(int i=0;i<renshu;i++)
{
cout<<"请输入第"<<i+1<<"个捐款者的姓名和数目(中间用空格隔开)：";
cin>>p[i].name>>p[i].money;
if(p[i].money>=10000)
p2[i]=1;
else p2[i]=0;
}
cout<<"grand patrons"<<endl;
for(int i=0;i<renshu;i++)
{
if(p2[i]==1)
cout<<p[i].name<<" "<<p[i].money<<endl;
}
cout<<"patrons"<<endl;
for(int i=0;i<renshu;i++)
{
if(p2[i]==0)
cout<<p[i].name<<" "<<p[i].money<<endl;
}
ofstream outFile;
outFile.open("patron.txt");
outFile<<renshu<<endl;
for(int i=0;i<renshu;i++)
{
outFile<<p[i].name<<endl<<p[i].money<<endl;
}
outFile.close();
delete [] p;
return 0;
}