Зміст курсу

C++ Data Types

1. Introduction

Overview Arithmetic Operations Division int and double Math in C++Specifying a Type

2. Numerical Data Types

Integers Using Integers Type modifier Float Double Numerical Data Types Summary

3. Text Data Type

Char String Working with String Elements String Methods Changing The String Practice Finding Text in a String

4. Other Data Types and Concepts

Boolean Boolean Expressions Void Auto Unsigned Implicit Type Conversion Explicit Type Conversion

Arithmetic Operations

Setting the precision

As you already should know you can perform basic data manipulation using arithmetic operators such as addition (+), subtraction (-), division (/), and multiplication (*). Additionally, the modulus operator (%) calculates the remainder of a division.

main


              123456789
            
#include <iostream>
#include <iomanip>

int main()
{
    // Uncomment to see the difference
    // std::cout << std::fixed;
    std::cout << std::setprecision(5) << 15.125 * 0.8309 << std::endl;
}

In the example above, floating-point results may occasionally be produced during calculations. To manage the precision of these results, you can use std::setprecision in combination with std::fixed. This allows you to control the number of digits displayed after the decimal point, ensuring consistent precision in your output.

Note
Without std::fixed, std::setprecision controls the total number of digits displayed, including both before and after the decimal points. With std::fixed, the number is displayed in fixed-point notation, keeping the decimal point in a fixed position.

Завдання

Swipe to show code editor

Include <iomanip> to be able to set precision.
Follow the comments to set a precision.
Calculate and output the equivalent of 5 miles in kilometers rounding to one decimal place.

Note
To convert 5 miles to kilometers, you would multiply the number of miles by the conversion factor (1.60934).

_{Once you've completed this task, click the button below the code to check your solution.}

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Секція 1. Розділ 2

Arithmetic Operations

Setting the precision

main


              123456789
            
#include <iostream>
#include <iomanip>

int main()
{
    // Uncomment to see the difference
    // std::cout << std::fixed;
    std::cout << std::setprecision(5) << 15.125 * 0.8309 << std::endl;
}

Note
Without std::fixed, std::setprecision controls the total number of digits displayed, including both before and after the decimal points. With std::fixed, the number is displayed in fixed-point notation, keeping the decimal point in a fixed position.

Завдання

Swipe to show code editor

Include <iomanip> to be able to set precision.
Follow the comments to set a precision.
Calculate and output the equivalent of 5 miles in kilometers rounding to one decimal place.

Note
To convert 5 miles to kilometers, you would multiply the number of miles by the conversion factor (1.60934).

_{Once you've completed this task, click the button below the code to check your solution.}

Все було зрозуміло?

Дякуємо за ваш відгук!

Секція 1. Розділ 2

Arithmetic Operations

Setting the precision

main


              123456789
            
#include <iostream>
#include <iomanip>

int main()
{
    // Uncomment to see the difference
    // std::cout << std::fixed;
    std::cout << std::setprecision(5) << 15.125 * 0.8309 << std::endl;
}

Note
Without std::fixed, std::setprecision controls the total number of digits displayed, including both before and after the decimal points. With std::fixed, the number is displayed in fixed-point notation, keeping the decimal point in a fixed position.

Завдання

Swipe to show code editor

Include <iomanip> to be able to set precision.
Follow the comments to set a precision.
Calculate and output the equivalent of 5 miles in kilometers rounding to one decimal place.

Note
To convert 5 miles to kilometers, you would multiply the number of miles by the conversion factor (1.60934).

_{Once you've completed this task, click the button below the code to check your solution.}

Все було зрозуміло?

Дякуємо за ваш відгук!

Setting the precision

main


              123456789
            
#include <iostream>
#include <iomanip>

int main()
{
    // Uncomment to see the difference
    // std::cout << std::fixed;
    std::cout << std::setprecision(5) << 15.125 * 0.8309 << std::endl;
}

Note
Without std::fixed, std::setprecision controls the total number of digits displayed, including both before and after the decimal points. With std::fixed, the number is displayed in fixed-point notation, keeping the decimal point in a fixed position.

Завдання

Swipe to show code editor

Include <iomanip> to be able to set precision.
Follow the comments to set a precision.
Calculate and output the equivalent of 5 miles in kilometers rounding to one decimal place.

Note
To convert 5 miles to kilometers, you would multiply the number of miles by the conversion factor (1.60934).

_{Once you've completed this task, click the button below the code to check your solution.}

Секція 1. Розділ 2