#include<stdio.h>
void main()
{
float x,n,c,sum=0,a=1,b=2;
for(n=1;n<=20;n++)
{
x=b/a;
sum=sum+x;
c=a;
a=b;
b=c+b;
}
printf("sum=%f",sum);
}
void main()
{
float x,n,c,sum=0,a=1,b=2;
for(n=1;n<=20;n++)
{
x=b/a;
sum=sum+x;
c=a;
a=b;
b=c+b;
}
printf("sum=%f",sum);
}