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01.05.2014
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# include <stdlib.h>
# include <iostream.h>
# include <math.h>
# include <stdlib.h>
# include <conio.h>

double F (double n)
{double Fn,Fn_1,Fn_2,k;
Fn=Fn_1=Fn_2=1;
k=2;

while (k<=n)
{
Fn=Fn_1+Fn_2;
Fn_1=Fn_2;
Fn_2=Fn;
k++;
}

return Fn; }

double test1,test2,test3,test4,Lk,Fn_1,Fn_2,Fn,k,n,L1,L2;

void main ()
{
clrscr();
Fn=Fn_1=Fn_2=1;
cout<<"Vvedite n (celoe):"<<'\n';
cin>>n;
cout<<"—Ёб«® ”ЁЎ®­ зЁ="<<F(n)<<'\n';

/* k=2;
while (k<=n)
{
Fn=Fn_1+Fn_2;
Fn_1=Fn_2;
Fn_2=Fn;
k++;
}
cout<<"Chislo Fibanachi="<<Fn<<'\n';
*/
cout<<"‚ўҐ¤ЁвҐ L1"<<'\n';
cin>>L1;
cout<<"‚ўҐ¤ЁвҐ Ln"<<'\n';
cin>>Lk;
// L2=L1*F(n)/F(n+1);
// L2=F(1)/F(2)*L1;
n=0;
while (F(n)<=L1/Lk)
{n=n+1;}

/* n=0;
while (L2/L1!=F(n)/F(n+1))
{test1=L2/L1;
test2=F(n);
test4=F(n+1);
test3=F(n)/F(n+1);

n=n+1;

}
*/
cout<<"—Ёб«® Ё­вҐа жЁ©="<<n<<'\n';
getch();
}
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