Question 1018:c Language Programming tutorial (third Edition) after class exercise 6.8

/******************************************************************** @file main.cpp@date 2017-05-12@author Zor O_tiger@brief Problem 1018:c Language Programming Tutorial (third Edition) After class exercise 6.8http://www.dotcpp.com/oj/problem1018.html********************************************************************/#include<cstdio>#defineTEST#undefTESTintMainintargcConst Char*argv[]) {#ifdef TEST freopen ("In.txt","R", stdin); Freopen ("OUT.txt","W", stdout);#endif    intNumber_n =0;  while(SCANF ("%d", &number_n)! =EOF) {        DoubleA =1, B =2, sum =0;  for(inti =0; i < number_n; ++i) {sum+ = b/A; A= a + b;//the value of the!a value itself is discarded//! ExchangeA = a +b; b= A-b; A= A-b; } printf ("%.2lf\n", sum); }    return 0;}

Question 1018:c Language Programming tutorial (third Edition) after class exercise 6.8