Write a function template to swap the numbers.
Sep 23, 2018Program Source Code:
#include<iostream>
using namespace std;
// defining the function template that
// swaps two numbers
// here we use pass by reference concept
template <class T>
void swapthem(T &t1, T &t2){
T temp;
temp = t1;
t1 = t2;
t2 = temp;
}
int main(){
int num1 = 20, num2 = 50;
cout<<"Before swap:"<<endl;
cout<<"num1 = "<<num1<<" and num2 = "<<num2<<endl;
swapthem(num1, num2);
cout<<"After swap:"<<endl;
cout<<"num1 = "<<num1<<" and num2 = "<<num2<<endl;
return 0;
}
Sample Run:
Before swap: num1 = 20 and num2 = 50 After swap: num1 = 50 and num2 = 20
