Question

White a function that swaps values using templates

int main ( ) {

int X=5

int Y=29 ;

double a = 1.0 ;

double b = 3.14 ;

swap ( X , Y ) ;

swap ( a , b ) ;

return 0 ;

}

I need you to explain it step by step

Answer 1

#include <iostream>

using namespace std;

template <typename T>   // make this function templated
void swap(T &n1, T &n2) {   // use T as type of parameters
    T temp = n1;    // set temp as n1
    n1 = n2;    // change n1 to n2
    n2 = temp;  // change n2 to original value of n1 using temp
}

int main() {
    int X = 5;
    int Y = 29;
    double a = 1.0;
    double b = 3.14;
    swap(X, Y);
    swap(a, b);
    return 0;
}