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MUST USE C++

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Question 1: Template Function with Pointer Arguments

Design and implement a template function, called swapt(T *p1, T *p2), which takes two parameters with the same generic data type. The function swaps the values of these two parameters.

Test this function in the following main( ) :

int main( )

{

            int x = 30,   y = 40;

            swapt(&x, &y);

            cout << “x = “ << x << “ y= “ << y << endl;

            float w = 3.7, v = 1.2;

            swapt(&w, &v);

            cout << “w = “ << w << “ v= “ << v << endl;

string a = ‘good’,   b= ‘morning’;

            swapt(&a, &b);

            cout << “a = “ << a << “ b= “ << b << endl;

            return 0;

}

Answer 1

#include <iostream>
#include <string>

using namespace std;

template<class T>
void swapt(T *n1, T *n2) {
    T temp = *n1; // store n1 in temp
    *n1 = *n2; // store n2 in n1
    *n2 = temp; // finally store temp in n2 to complete the swap
}

int main() {
    int x = 30, y = 40;
    swapt(&x, &y);
    cout << "x = " << x << " y= " << y << endl;
    float w = 3.7, v = 1.2;
    swapt(&w, &v);
    cout << "w = " << w << " v= " << v << endl;
    string a = "good", b = "morning";
    swapt(&a, &b);
    cout << "a = " << a << " b= " << b << endl;
    return 0;
}