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#include <iostream>
#include <vector>
#include <math.h>
#include "Expression.hpp"
#include "Operator.hpp"
#include "EquationSystem.hpp"
#include "ExpressionFactory.hpp"
using namespace std;
struct Variable : public Operator<float> {
Variable(const std::string& x)
: _value(x) { }
const float eval(const vector<Expression<float> >& v, const map<string, float>& m) const {
//assert(v.size() == 0);
return m.find(_value)->second;
}
virtual std::string output() const {
return "var";
}
private:
std::string _value;
};
struct Const : public Operator<float> {
Const(const float& x)
: _value(x) { }
const float eval(const vector<Expression<float> >& v, const map<string, float>& m) const {
//assert(v.size() == 0);
return _value;
}
virtual std::string output() const {
return "const";
}
private:
float _value;
};
struct Plus : public Operator<float> {
Plus(const float& x)
: _value(x) { }
const float eval(const vector<Expression<float> >& v, const map<string, float>& m) const {
//assert(v.size() == 1);
return _value + v[0].eval(m);
}
virtual std::string output() const {
return "+()";
}
private:
float _value;
};
struct Mult : public Operator<float> {
Mult(const float& x)
: _value(x) { }
const float eval(const vector<Expression<float> >& v, const map<string, float>& m) const {
//assert(v.size() == 1);
return _value * v[0].eval(m);
}
virtual std::string output() const {
return "*()";
}
private:
float _value;
};
ExpressionFactory<float> f;
Expression<float> constant(float x) {
return f.createExpression(new Const(x), vector<Expression<float> >());
}
Expression<float> variable(string x) {
return f.createExpression(new Variable(x), vector<Expression<float> >());
}
Expression<float> add(float a, Expression<float> b) {
vector<Expression<float> > args;
args.push_back(b);
return f.createExpression(new Plus(a), args);
}
Expression<float> Max(Expression<float> a, Expression<float> b) {
vector<Expression<float> > args;
args.push_back(a);
args.push_back(b);
return f.createExpression(new Maximum<float>(), args);
}
Expression<float> Min(Expression<float> a, Expression<float> b) {
vector<Expression<float> > args;
args.push_back(a);
args.push_back(b);
return f.createExpression(new Minimum<float>(), args);
}
void tests() {
map<string,float> assignment;
assignment["x"] = -INFINITY;
EquationSystem<float> test;
test.add("x", Max(constant(0),
Min(add(1, variable("x")),
constant(100))));
test = test.maxStrategy(assignment);
cout << test.output();
assignment = test.solveBF(-INFINITY);
cout << assignment["x"] << endl;
test = test.maxStrategy(assignment);
cout << test.output();
assignment = test.solveBF(-INFINITY);
cout << assignment["x"] << endl;
}
int main () {
tests();
/*typedef Expression<float> E;
typedef vector<E> Args;
Args empty;
EquationSystem<float> test;
// problem:
// x = max(y, 10)
// y = 10 * x
test.add("x1", Max(constant(0),
Min(add(-1, variable("x1")),
variable("x2"))));
test.add("x2", Max(constant(0),
Max(add(5, variable("x1")),
variable("x1"))));
test.add("x3", Max(constant(0),
Max(add(1, variable("x3")),
add(0, variable("x1")))));
map<string, float> m = test.solveBF(-INFINITY);
cout << m["x1"] << endl;
cout << m["x2"] << endl;
cout << m["x3"] << endl;
m = test.maxStrategy(m).solveBF(-INFINITY);
cout << m["x1"] << endl;
cout << m["x2"] << endl;
cout << m["x3"] << endl;*/
/*Args xArgs;
xArgs.push_back(E(new Variable("x"), empty));
xArgs.push_back(E(new Const(10), empty));
test.add("x", E(new Maximum<float>(), xArgs));
Args yArgs;
yArgs.push_back(E(new Variable("x"), empty));
test.add("y", E(new Mult(10), yArgs));
map<string, float> m = test.solveBF(-INFINITY);
cout << m["x"] << endl;
cout << m["y"] << endl;
map<string,float> assignment;
assignment["x"] = -INFINITY;
assignment["y"] = -INFINITY;
map<string, float> result = test.maxStrategy(assignment).solveBF(INFINITY);
cout << result["x"] << endl;
cout << result["y"] << endl;
assignment["x"] = 12;
cout << E(new Maximum<float>(), xArgs).maxStrategyEager(assignment).eval(assignment) << endl;*/
return 0;
}
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