View Code of Problem 48

#include<stdio.h>
int main(){
	double sum=0;
	int a=2,b=1,c,n,i;

	scanf("%d",&n);

	for(i=1;i<=n;i++){
		s+=(1.0*a/b);
		c = b;
		b = a;
		a = a+c;
	}

	printf("%.6f", sum);
	return 0;
}
/*
Main.c: In function 'main':
Main.c:9:3: error: 's' undeclared (first use in this function)
   s+=(1.0*a/b);
   ^
Main.c:9:3: note: each undeclared identifier is reported only once for each function it appears in
*/