Question

How to swap two variables using template in C++

Answer 1

#include <iostream>

template<class T>
void swap(T &a, T &b) {
    T temp = a;
    a = b;
    b = temp;
}

int main() {
    int x = 10;
    int y = 25;
    
    swap(x, y); // swap<int>(x, y);

    std::cout << x << " " << y;
}




/*
run:

25 10

*/

 

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Answer 2

#include <iostream>
 
template<class T>
void swap(T &a, T &b) {
    T temp = a;
    a = b;
    b = temp;
}
 
int main() {
    float x = 3.14;
    float y = 1.07;
     
    swap(x, y); // swap<float>(x, y);
 
    std::cout << x << " " << y;
}
 
 
 
 
/*
run:
 
1.07 3.14
 
*/

 

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