3.14 LAB: Input and formatted output: Caffeine levels A half-life is the amount of time it takes for a substance or entity to fa

Question

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3.14 LAB: Input and formatted output: Caffeine levels A half-life is the amount of time it takes for a substance or entity to fa

ll 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. Use a string formatting expression with conversion specifiers to output the caffeine amount as floating-point numbers.

Computers and Technology

1 answer:

zubka84 [1K] · Answer 1 · 2026-02-18T06:11:08+03:00

Answer:

#include <iostream>

#include <iomanip>

using namespace std;

int main()

{

double caffeineMg;

cin>>caffeineMg;

cout<<"Después de 6 horas: "<<fixed<<setprecision(2)<<caffeineMg/2.0<<" mg\n";

cout<<"Después de 12 horas: "<<fixed<<setprecision(2)<<caffeineMg/4.0<<" mg\n";

cout<<"Después de 24 horas: "<<fixed<<setprecision(2)<<caffeineMg/8.0<<" mg\n";

return 0;

}

Explanation:

Define a variable for the caffeine amount and prompt the user for input.
Output results by calculating the caffeine based on the appropriate Half Life.
Utilize the setprecision function to ensure results are rounded to two decimal places.