Ich wollte eine Liste aus den unten angegebenen Structs sortieren.
Leider erhalte ich das die ganz unten Zitierten Compiler-Fehler.
Was mache ich falsch? / geht das vll auch einfacher?
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#include <iostream>
#include <list>
#include <functional>
struct ABC
{
int begin, end;
};
struct less_ABC
: public binary_function<ABC, ABC, bool>
{
bool operator()(const ABC& x, const ABC& y) const {return x.begin < y.begin;}
};
int main()
{
std::list<ABC> myList;
ABC dummy;
dummy.begin = 5;
dummy.end = 10;
myList.push_back(dummy);
dummy.begin = 10;
dummy.end = 15;
myList.push_back(dummy);
dummy.begin = 15;
dummy.end = 20;
myList.push_back(dummy);
myList.sort(less_ABC);
}
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mingw32-make -f makefile all
g++ -c main.cpp
main.cpp:11: error: expected template-name before '<' token
main.cpp:11: error: expected `{' before '<' token
main.cpp:11: error: expected unqualified-id before '<' token
main.cpp:11: error: expected `,' or `;' before '<' token
main.cpp: In function `int main()':
main.cpp:37: error: invalid use of undefined type `struct less_ABC'
main.cpp:11: error: forward declaration of `struct less_ABC'
mingw32-make: *** [main.o] Error 1