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05_02_unit_conversion

Description:

Rather than rewriting code to convert one unit to another multiple times, we will write one single function to convert any unit of measurement to any other unit of measurement. Then, we will build individual functions to convert specific units of measurement. 

Function

  • Declare following functions in includes/unit_conversion/unit_conversion.h
  • Implement following functions in includes/unit_conversion/unit_conversion.cpp

Step 1

Universal Conversion Function: Write a single function to convert any pairs of units of measurement to any other pairs of units, provided it is passed the necessary information to do the conversion. All four types of conversions must be handled by the single function.

Step 2

Write pairs of functions to convert:

  • feet and inches to meters and centimeters and vice versa
  • pounds and ounces to kilograms and grams and vice versa
  • liters and milliliters to gallons and ounces and vice versa

Constants local to specific conversion functions

These will be declared and used within specific conversion functions (FeetInches2MetersCentimeters for example) Then the specific conversion functions will call the universal conversion function passing it these constants. Like this:

Convert (feet, inch, meters, cm, IN_IN_FEET, CM_PER_IN, CM_IN_METERS)

Conversion between lengths, weight, and volume:

Conversion factors Value
IN_IN_FOOT 12
CM_IN_METER 100
CM_PER_IN 2.54
IN_PER_CM 0.393701
OZ_IN_LB 16
GRAM_IN_KG 1000
GRAM_PER_OZ 28.3495
OZ_PER_GRAM 0.035274
ML_IN_LITER 1000
OZ_IN_GALLON 128
ML_PER_OZ 0.033814
OZ_PER_ML 29.5735

Reference