Answer:
Following are the program in the C++ programming Language.
//header files
#include <iostream>
#include <vector>
using namespace std;//name space
// define main method
int main()
{
//set integer variables
int size, num;
//get input the size of the list
cout<<"Enter size of list: ";
cin >> size;
//set integer type vector variable
vector<int> vecs;
//Set the for loop
for (int index = 0; index < size; ++index)
{//get elements of the list from the user
cout<<" :";
cin >> num;
//push back the elements of the list
vecs.push_back(num);
}
//storing the first two elements in variable
int n = vecs[0], n1 = vecs[1], current , temp;
//set if conditional statement
if (n > n1)
{
//perform swapping
temp = n;
n = n1;
n1 = temp;
}
//Set for loop
for (int index = 2; index < size; ++index)
{
//store the value of the vector in the variable
current = vecs[index];
//set if conditional statement
if (current < n)
{
//interchange the elements of the variable
n1 = n;
n = current;
}
else if(current < n1)
{
n1 = current;
}
}
//print the value of first two smallest number.
cout <<"\n" <<n << " " << n1 << endl;
return 0;
}
<u>Output:</u>
Enter size of list: 5
:10
:5
:3
:21
:2
2 3
Explanation:
Here, we define the required header files and namespace then, we define "main()" function inside the main function.
- Set two integer data type variable "size", "num".
- Print message and get input from the user in variable "size".
- Then, we set integer vector type variable "vecs".
- Set the for loop to get the number of input in the variable "num" from user.
- Then, we push back the elements of the list and store first two elements of the list in the variable "n", "n1".
- Set the conditional statement to perform swapping.
- Define the for loop to store the list of the vector in the integer type variable "current".
- Finally, we print the value of the two smallest numbers of the list.
