Summary  
C++ arithmetic operators produce a result of the same type as their operands, so dividing two ints discards the fractional part and yields an integer, whereas using at least one float or double preserves decimals.

General domain of usage  
Numeric computations

We will not stop on most operations since they work as expected.  Instead, let's look at the reasons behind the incorrect result obtained from the division operation. Those are explained in a video below:

It's not just a problem limited to division.   When you use operators such as `+`, `-`, `*`, or `/` on variables of certain types, the resulting value will have the same type as the operands.

**It's important to be mindful of these possibilities and take them into account.**

#define CATCH_CONFIG_MAIN
#include <catch2/catch.hpp>

int calculatePayment(double distance_km, int rate_per_km);

TEST_CASE("Calculate payment for 12.4 km at 6 per km returns 72", "[calculatePayment]") {
    REQUIRE(calculatePayment(12.4, 6) == 72);
}

TEST_CASE("Calculate payment for 7.9 km at 5 per km returns 35", "[calculatePayment]") {
    REQUIRE(calculatePayment(7.9, 5) == 35);
}

TEST_CASE("Calculate payment for 3.2 km at 10 per km returns 30", "[calculatePayment]") {
    REQUIRE(calculatePayment(3.2, 10) == 30);
}

TEST_CASE("Calculate payment for 0 km at 10 per km returns 0", "[calculatePayment]") {
    REQUIRE(calculatePayment(0.0, 10) == 0);
}

TEST_CASE("Calculate payment for 15.99 km at 4 per km returns 60", "[calculatePayment]") {
    REQUIRE(calculatePayment(15.99, 4) == 60);
}

test.cpp

Developing a comprehensive understanding of data types is crucial when learning a programming language. This course offers an opportunity to delve deeper into data types in C++, gaining insights into how they are stored in memory. Additionally, the course covers the topic of type conversion.

Provides a foundational overview of arithmetic operations and their pitfalls, data types, and the importance of specifying types.

short, int, long, float, double, etc. are all numerical data types. You will learn about all of them as well as the pitfalls they may conceal.

Covers working with text in C++ using `char` and `string`. You'll learn how to store and manipulate characters, use string methods, index and modify strings, find text, and understand string memory management. By the end, you'll be ready to handle text efficiently in your programs.

Covers logical values with bool, functions without return values using void, and automatic type deduction with auto. It also explores type conversion, including both implicit and explicit casting, ensuring correct handling of data types.

Challenge: Division int and double

Soluzione

Awesome!

Challenge: Division int and double

Soluzione