C++
- Getting started with C++
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- Alignment
- Argument Dependent Name Lookup
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- Curiously Recurring Template Pattern (CRTP)
- Data Structures in C++
-
Date and time using
header - decltype
- Design pattern implementation in C++
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- Side by Side Comparisons of classic C++ examples solved via C++ vs C++11 vs C++14 vs C++17
- Singleton Design Pattern
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- Standard Library Algorithms
- static_assert
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- The Rule of Three, Five, And Zero
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- User-Defined Literals
- Self-made user-defined literal for binary
- Standard user-defined literals for complex
- Standard user-defined literals for duration
- Standard user-defined literals for strings
- User-defined literals with long double values
- Using declaration
- Using std::unordered_map
- Value and Reference Semantics
- Value Categories
- Variable Declaration Keywords
- Virtual Member Functions
C++ User-Defined Literals User-defined literals with long double values
Example
#include <iostream>
long double operator"" _km(long double val)
{
return val * 1000.0;
}
long double operator"" _mi(long double val)
{
return val * 1609.344;
}
int main()
{
std::cout << "3 km = " << 3.0_km << " m\n";
std::cout << "3 mi = " << 3.0_mi << " m\n";
return 0;
}
The output of this program is the following:
3 km = 3000 m
3 mi = 4828.03 m
