p63 2-28（1）

include

using namespace std;

int main()

{

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

char a='A',d='D',s='S',q='Q',e;

cout<<"数据已经"<<endl;

while(1)

{

cin>>e;

if(e==a)

{

cout<<"增加";

continue;

}

else if(e==d)

{

cout<<"删除";

continue;

}

else if(e==s)

{

cout<<"排序";

continue;

}

else (e==q);

{

cout<<"结束";

break;

}

}

return 0;

}

p63 2-28(2)

include

using namespace std;

int main()

{

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

char a='A',d='D',s='S',q='Q',e;

cout<<"数据已经"<<endl;

while(1)

{

cin>>e;

switch(e)

{

case 'A':cout<<"增加";continue;

case 'D':cout<<"删除";continue;

case 'S':cout<<"排序";continue;

case 'Q':cout<<"结束";break;

}

}

return 0;

}

p63 2-29

include

using namespace std;

int main()

{

int i,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);

}