1

#include<iostream>

using namespace std;

int main(){

char n;

 while(1)

 {

 cout<<"Menu:A(dd) D(elete) S(ort) Q(uit),Select one"<<endl;

 cin>>n;

 if(n=='A')

 cout<<"数据已经增加"<<endl;

 

 else if(n=='D')

 cout<<"数据已经删除"<<endl;

 

 else if(n=='S')

 cout<<"数据已经排序"<<endl;

 

 else if(n=='Q')

 break;

 

 else

 cout<<"wrong selection"<<endl;

}

return 0;

}

 

 

 

2

#include<iostream>

using namespace std;

int main(){

 int n=2;

 for(n=2;n<=100;n++)

{

 int m=0;

 for(m=2;m<=n;m++)

 {

  if(n%m==0)

  {

  break;

  }

 }

 if(n==m)

 {

  cout<<n<<endl;

 }

}

return 0;

}

 

 

#include<iostream>

using namespace std;

int main()

{

    int m=2,n=1;

    cout<<m<<"  ";

    do { int i;

        for(i=2;i<m;i++)

        {

            if(m%i==0)

            {

                break;

            }

            else if(m%i!=0&&i==m-1)

            {

                if(n%5==0)

                {

                    cout<<endl;

                }

                cout<<m<<"  ";

                n++;

            }

        }

       m++;

    }

while(m<=100);

   return 0;

}

 

 

 

#include<iostream>

using namespace std;

int main(){

cout<<"几种颜色：";

int tnumber=0, number=0, i=0, s=0, x=0, k=0;

cin>>tnumber;

cout<<"几种颜色：";

cin>>number;

int sm=tnumber;

int st=number;

while(st>1){

sm=sm*(tnumber-1);

tnumber--;

st--;

}

int xm=1;

for(i=1;i<number;i++){

xm=xm*(i+1);

}

k=sm/xm;

cout<<"有"<<k<<"种取法！";

}

 

 

 

 

#include<iostream.h>

void main()

{

inti,j,n,m;

i=2;

do

{

m=1;

n=i/2;

j=2;

do

{

if(i%j==0)

{

m=0;

break;

}

j++;

}

while(j<=n);

if(m)

cout<<i<<" ";

i++;

}

while(i<101);

}