Submission #1678191


Source Code Expand

#include "iostream"
#include <string>
using namespace std;
int main() {
	double a[6] ;
	double ans=0;
	cin >> a[0] >> a[1] >> a[2] >> a[3] >> a[4] >> a[5];
	a[2] -= a[0];
	a[3] -= a[1];
	a[4] -= a[0];
	a[5] -= a[1];
	ans = abs(a[2] * a[5] - a[3] * a[4]) / 2;
	cout << ans<<endl;
	return(0);
}

Submission Info

Submission Time
Task C - 直訴
User nos_KMC
Language C++14 (GCC 5.4.1)
Score 0
Code Size 308 Byte
Status CE

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:13:37: error: call of overloaded ‘abs(double)’ is ambiguous
  ans = abs(a[2] * a[5] - a[3] * a[4]) / 2;
                                     ^
In file included from /usr/include/c++/5/cstdlib:72:0,
                 from /usr/include/c++/5/ext/string_conversions.h:41,
                 from /usr/include/c++/5/bits/basic_string.h:5334,
                 from /usr/include/c++/5/string:52,
                 from /usr/include/c++/5/bits/locale_classes.h:40,
                 from /usr/include/c++/5/bits/ios_base.h:41,
                 from /usr/include/c++/5/ios:42,
                 from /usr/include/c++/5/ostream:38,
                 from /usr/include/c++/5/iostream:39,
                 from ./Main.cpp:2:
/usr/include/stdlib.h:775:12: note: candidate: int abs(int)
 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
            ^
In file included from /usr/include/c++/5/ext/string_conversions.h:41:0,
                 from /usr/include/c++/5/bits/basic_...