public void ChangeStrategy(char @operator)
{
IStrategy currentStrategy = null;
switch (@operator)
{
case '+':
currentStrategy = new AdditionStrategy();
break;
case '-':
currentStrategy = new SubtractionStrategy();
break;
case '*':
currentStrategy = new MultiplicationStrategy();
break;
case '/':
currentStrategy = new DivisionStrategy();
break;
}
this.strategy = currentStrategy;
}
public PrimitiveCalculator()
{
this.additionStrategy = new AdditionStrategy();
this.subtractionStrategy = new SubtractionStrategy();
this.multiplicationStrategy = new MultiplicationStrategy();
this.divisionStrategy = new DivisionStrategy();
this.strategies = new Strategy[] { this.additionStrategy, this.subtractionStrategy, this.multiplicationStrategy, this.divisionStrategy };
this.currentStrategy = this.additionStrategy;
}