Submission #7101484

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Source Code Expand

#include <iostream>
#include <iomanip>
using namespace std;

int main(void){
    double a,b,c,d,e,f;
    cin >> a >> b >> c >> d >> e >> f; 
    cout << setprecision(12) << abs( (c-a)*(f-b) - (d-b)*(e-a) ) / 2 << endl;
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:64: error: call of overloaded ‘abs(double)’ is ambiguous
     cout << setprecision(12) << abs( (c-a)*(f-b) - (d-b)*(e-a) ) / 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...