du1.cpp

高级语言程序设计JAVE

# include <iostream.h>
void main()
{
	int a, b;
	int i=0;
	double sum(0);
	b=1,a=1;
	int temp;
	for(i=0;i<21;i++)
	{
		b+=a;
	temp=a;
		a=b;
		b=temp;
		
		cout<<a<<"'"<<b<<"\n";
		sum+=(double(a)/(double)b);
	}	
	cout<<"sum="<<sum;
}