Write generic functions and classes.
✍️ 2 exercises in this lessonTemplates let you write code once and use it with any type. The compiler generates a version for each type you use.
template <typename T> T biggest(T a, T b)template <typename T> class Box { T value; };The whole Standard Library (vector<int>, map<string, int>) is built with templates.
Mastering C++ Templates helps you write clean and reliable C++ code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
#include <iostream>
#include <string>
template <typename T>
T biggest(T a, T b) { return a > b ? a : b; }
template <typename T>
class Box {
T value;
public:
explicit Box(T v) : value(v) {}
T get() const { return value; }
};
int main() {
std::cout << biggest(3, 9) << "\n";
std::cout << biggest(2.5, 1.5) << "\n";
std::cout << biggest<std::string>("apple", "mango") << "\n";
Box<std::string> b("Templates!");
std::cout << b.get() << "\n";
return 0;
}9 2.5 mango Templates!
Check what you learned in “C++ Templates”.
Declare a function template.
<typename T>
T biggest(T a, T b) { return a > b ? a : b; }
Templates let you…
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