C# Error cannot convert string to int

Question

Hello! I've been working on this 2 class Bmi calculator have narrowed it down to 2 errors on the second class.

 

I've trying to figure out how I can make it convert string to int or give back a number value. I'm still new to this and any help is appreciated!

 

First part

 

 

using System;

namespace Calculator

{

public class BMICalc

{

private const

decimal REQ = 703;

private int weightPerson;

private int heightPerson;

public BMICalc()

{

}

public BMICalc(int weiP, int heiP)

{

this.weightPerson = weiP;

this.heightPerson = heiP;

}

public decimal SetBmi()

{

decimal bmi;

bmi = (this.weightPerson * BMICalc.REQ) / (this.heightPerson * this.heightPerson);

if (bmi < 18.5m)

{

Console.WriteLine("UnderWeight");

Console.ReadLine();

}

if (bmi > 18.5m && bmi < 25.0m)

{

Console.WriteLine("Normal");

Console.ReadLine();

}

if (bmi > 25.0m && bmi < 29.9m)

{

Console.WriteLine("OverWeight");

Console.ReadLine();

}

if (bmi > 29.9m && bmi < 40.0m)

{

Console.WriteLine("Obese");

Console.ReadLine();

}

return bmi;

}

public override string ToString()

{

return "\tCalculator" +

"\n\n Weight:" + this.weightPerson +

"\n\n Height:" + this.heightPerson +

"\n\n BMI Score:" + SetBmi().ToString("C");

}

}

}

 

 

Second part

 

 

namespace Calculator

{

public class App

{

public static void Main() //

{

int heiP, weiP;

heiP = InputHeight();

// main error here

weiP = InputWeight();

BMICalc bmiCal = new BMICalc(heiP, weiP);

Console.Clear();

Console.WriteLine(bmiCal.ToString());

Console.ReadKey();

}

public static int InputHeight()

{

int hNumber;

Console.Write("Please enter your height");

hNumber = Console.ReadLine(); // error is here

return hNumber;

}

public static int InputWeight()

{

int wNumber;

Console.Write("Please enter your height");

wNumber = Console.ReadLine(); // error is here

return wNumber;

}

}

}