用C语言编写一个程序求数列2/1，3/2，5/3，8/5....前十项之和

#include <iostream>
using namespace std;
int main (){
cout << "OK" << endl;
int n = 10;
int a = 1;
int b = 2;
int temp;
float sum = 0;
for ( int i=0; i<n ; i++){
sum += sum + b/a;
temp = b;
b = a + b;
a = temp;
}
cout << "sum : " << sum << endl;
return 1;
}