$2\mathrm{.}26$ LAB: Caffeine levels

A half$-$life is the amount of time it takes for a substance or entity to fall to half its original value. Caffeine has a half$-$life of about $6$ hours in humans. Given caffeine amount $($in $mg)$ as input, output the caffeine level after $6,12,$ and $24$ hours.

Output each floating$-$point value with two digits after the decimal point, which can be achieved by executing cout $$ fixed $$ setprecision$(2)$; once before all other cout statements.

Ex: If the input is:

$100$

the output is:

After $6$ hours: $50\mathrm{.}00mg$

After $12$ hours: $25\mathrm{.}00mg$

After $24$ hours: $6\mathrm{.}25mg$

Note: A cup of coffee has about $100$ mg$.$ A soda has about $40$ mg$.$ An "energy" drink $($a misnomer$)$ has between $100$ mg and $200$ mg$.$

LAB

ACTIVITY

$2\mathrm{.}26\mathrm{.}1$: LAB: Caffeine levels

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