Submission #5023883


Source Code Expand

#include <iostream>

using namespace std;

int main()
{
	double xa, ya, xb, yb, xc, yc;
	cin >> xa >> ya >> xb >> yb >> xc >> yc;

	cout << abs((xa - xc) * (yb - yc) - (xb - xc) * (ya - yc)) / 2 << endl;

	return 0;
}

Submission Info

Submission Time
Task C - 直訴
User syuntdg62
Language C++14 (GCC 5.4.1)
Score 0
Code Size 229 Byte
Status CE

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:10:59: error: call of overloaded ‘abs(double)’ is ambiguous
  cout << abs((xa - xc) * (yb - yc) - (xb - xc) * (ya - yc)) / 2 << endl;
                                                           ^
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:1:
/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,
...