5.8-6

#include<iostream>
int main()
{
using namespace std;
int i=1;
while(i<=64)
{
cout<<i<<"、";
i=i*2;
}
cout<<endl;
system("pause");
return 0;
}

5.9-1

#include<iostream>
int main()
{
using namespace std;
int number1,number2;
int sum=0;
cout<<"Enter two numbers：";
cin>>number1>>number2;
for (int i=number1;i<=number2;i++)
{
sum=sum+i;
}
cout<<"sum = "<<sum<<endl;
system("pause");
return 0;
}

5.9-2

#include<iostream>
#include<array>
const int ArSize=101;
int main()
{
using namespace std;
array<long double,ArSize> arr;
arr[1]=arr[0]=1;
for (int i=2;i<ArSize;i++)
arr[i]=i*arr[i-1];
for (int i=0;i<ArSize;i++)
cout<<i<<"! = "<<arr[i]<<endl;
system("pause");
return 0;
}