View Code of Problem 74

#include<iostream>
#include <stdio.h>
#include <string.h>
using namespace std;


int main() {
	double n;
	scanf("%lf", &n);
	double x1,x2;
	x1 = 1;
	x2 = 2;
	while (abs(x1 - x2) >= 0.00001) {
		x1 = x2;
		x2 = (x1 + n / x1)/2;
	}
	printf("%.3lf", x2);
	return 0;
}	
/*
Main.cc: In function 'int main()':
Main.cc:13:20: error: call of overloaded 'abs(double)' is ambiguous
  while (abs(x1 - x2) >= 0.00001) {
                    ^
Main.cc:13:20: note: candidates are:
In file included from /usr/include/c++/4.9/cstdlib:72:0,
                 from /usr/include/c++/4.9/ext/string_conversions.h:41,
                 from /usr/include/c++/4.9/bits/basic_string.h:2850,
                 from /usr/include/c++/4.9/string:52,
                 from /usr/include/c++/4.9/bits/locale_classes.h:40,
                 from /usr/include/c++/4.9/bits/ios_base.h:41,
                 from /usr/include/c++/4.9/ios:42,
                 from /usr/include/c++/4.9/ostream:38,
                 from /usr/include/c++/4.9/iostream:39,
                 from Main.cc:1:
/usr/include/stdlib.h:775:12: note: int abs(int)
 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
            ^
In file included from /usr/include/c++/4.9/ext/string_conversions.h:41:0,
                 from /usr/include/c++/4.9/bits/basic_string.h:2850,
                 from /usr/include/c++/4.9/string:52,
                 from /usr/include/c++/4.9/bits/locale_classes.h:40,
                 from /usr/include/c++/4.9/bits/ios_base.h:41,
                 from /usr/include/c++/4.9/ios:42,
                 from /usr/include/c++/4.9/ostream:38,
                 from /usr/include/c++/4.9/iostream:39,
                 from Main.cc:1:
/usr/include/c++/4.9/cstdlib:174:3: note: long long int std::abs(long long int)
   abs(long long __x) { return __builtin_llabs (__x); }
   ^
/usr/include/c++/4.9/cstdlib:166:3: note: long int std::abs(long int)
   abs(long __i) { return __builtin_labs(__i); }
   ^
*/