CS 193p Fall 2011 Assignment 3 Graphing Calculator--Task 3: Delegation3

gistfile1.m

- (float)deltaY:(GraphView *)sender
{
    float xVar = sender.xValue;
    
    id xVar2 = [NSNumber numberWithFloat:xVar];
    NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];

    [dict setValue:xVar2 forKey: @"x"];
    
    float result = [CalculatorBrain runProgram:self.graphStack usingVariableValues:dict];

    return result;
}