linux c++ 模板

#include <iostream>

// 函数模板定义
template <typename T>
void swap(T &a, T &b) {
    T temp = a;
    a = b;
    b = temp;
}

int main() {
    int x = 10, y = 20;
    std::cout << "Before swap: x = "<< x << ", y = "<< y << std::endl;
    swap(x, y); // 使用函数模板
    std::cout << "After swap: x = "<< x << ", y = "<< y << std::endl;
    return 0;
}

#include <iostream>

// 类模板定义
template <typename T>
class Array {
private:
    T *ptr;
    int size;

public:
    Array(T arr[], int s);
    void print();
};

template <typename T>
Array<T>::Array(T arr[], int s) {
    ptr = new T[s];
    size = s;
    for(int i = 0; i < size; i++)
        ptr[i] = arr[i];
}

template <typename T>
void Array<T>::print() {
    for (int i = 0; i < size; i++)
        std::cout << ptr[i] << " ";
    std::cout << std::endl;
}

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int n = sizeof(arr)/sizeof(arr[0]);
    Array<int> a(arr, n); // 使用类模板
    a.print();
    return 0;
}

g++ -o program program.cpp
./program