ement the Calculator struct and related function declarations in Calculator.h, and implement the related function definitions in Calculator.c as listed below: Calculator InitCalculator() - initialize the data member to 0.0 Calculator Add(double val, Calculator c) - add the parameter to the data member Calculator Subtract(double val, Calculator c) - subtract the parameter from the data member Calculator Multiply(double val, Calculator c) - multiply the data member by the parameter Calculator Divide(double val, Calculator c) - divide the data member by the parameter Calculator Clear(Calculator c) - set the data member to 0.0
OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
Implement in C
7.8.1: LAB: Calculator
Given main(), create the Calculator struct that emulates basic functions of a calculator: add, subtract, multiple, divide, and clear. The struct has one data member called value for the calculator's current value.
Implement the Calculator struct and related function declarations in Calculator.h, and implement the related function definitions in Calculator.c as listed below:
- Calculator InitCalculator() - initialize the data member to 0.0
- Calculator Add(double val, Calculator c) - add the parameter to the data member
- Calculator Subtract(double val, Calculator c) - subtract the parameter from the data member
- Calculator Multiply(double val, Calculator c) - multiply the data member by the parameter
- Calculator Divide(double val, Calculator c) - divide the data member by the parameter
- Calculator Clear(Calculator c) - set the data member to 0.0
- double GetValue(Calculator c) - return the data member
Given two double input values num1 and num2, the program outputs the following values:
- The initial value of the data member, value
- The value after adding num1
- The value after multiplying by 3
- The value after subtracting num2
- The value after dividing by 2
- The value after calling the clear() method
Ex: If the input is:
10.0 5.0
the output is:
0.0 10.0 30.0 25.0 12.5 0.0
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main.c
#include <stdio.h>
#include <string.h>
#include "Calculator.h"
void InitCalculator(Calculator c)
{
c.value = 0.0;
}
Calculator Add(double val, Calculator c)
{
c.value = c.value + val;
return c;
}
Calculator Subtract(double val, Calculator c)
{
c.value = c.value - val;
return c;
}
Calculator Multiply(double val, Calculator c)
{
c.value = c.value * val;
return c;
}
Calculator Divide(double val, Calculator c)
{
c.value = c.value / val;
return c;
}
Calculator Clear(Calculator c)
{
c.value = 0.0;
return c;
}
double GetValue(Calculator c)
{
return c.value;
}
Calculator.h
#ifndef CALCULATOR_H_
#define CALCULATOR_H_
typedef struct Calculator_struct {
double value;
} Calculator;
void InitCalculator(Calculator c); //also note here you have to accept the argument as Calculator c because you are passing it from main.c as calc
Calculator Add(double val, Calculator c);
Calculator Subtract(double val, Calculator c);
Calculator Multiply(double val, Calculator c);
Calculator Divide(double val, Calculator c);
Calculator Clear(Calculator c);
double GetValue(Calculator c);
#endif
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