Algorithm Library

[giraffe1234]

I'm including the algorithm library in my program but am getting this crazy error when I try and compile on my school's server.

 proj4.cpp:272: error: expected initializer before ‘evolvePopulation’
In file included from /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/algorithm:62,
                 from proj4.cpp:6:
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_algo.h: In function
 ‘void std::random_shuffle(_RAIter, _RAIter, _Generator&)
 [with _RAIter = __gnu_cxx::__normal_iterator<City*, std::vector<City, std::allocator<City> > >
, _Generator = std::vector<City, std::allocator<City> >]’:
proj4.cpp:111:   instantiated from here
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_algo.h:4998: 
error: no match for call to ‘(std::vector<City, std::allocator<City> >) (ptrdiff_t)’

Does anyone know what this could be referring to?

I'll post the lines of code where it says the error is occurring.

Line 272:
Population evolvePopulation(Population pop)

Line 111:
random_shuffle(tour.begin(), tour.end(), tour);

When I try and compile in Visual Studio, it brings up the algorithm library and says that the error comes from here:

template<class _RanIt,
	class _Fn1,
	class _Diff> inline
	void _Random_shuffle(_RanIt _First, _RanIt _Last, _Fn1& _Func, _Diff *)
	{	// shuffle nonempty [_First, _Last) using random function _Func
	_RanIt _Next = _First;
	for (_Diff _Index = 2; ++_Next != _Last; ++_Index)
		_STD iter_swap(_Next, _First + _Diff(_Func(_Index) % _Index));
	} 

With these errors:

error C2064: term does not evaluate to a function taking 1 arguments
error C1903: unable to recover from previous errors made

[ne555]

> I'll post the lines of code where it says the error is occurring.
http://www.eelis.net/iso-c++/testcase.xhtml
A testcase consisting of randomly copy&paste'd bits of code that you thought were relevant can obviously not reproduce the problem.


> random_shuffle(tour.begin(), tour.end(), tour);
http://www.cplusplus.com/reference/algorithm/random_shuffle/
gen: Unary function taking one argument and returning a value
¿does that describe `tour'?


> Population evolvePopulation(Population pop)
¿is that a function declaration?
¿is `Population' known at that point?

[Duthomhas]

Methinks you are missing some semicolons (;) somewhere in your code.