Question

Using C++

Write a template function that accepts an integer parameter and returns its integer square root.
The function should return -1, if the argument passed is not integer.
Demonstrate the function with a suitable driver program .

Answer 1

The answer to this question is as follows:

The code is as follows:

#include<bits/stdc++.h>
using namespace std;
int Sqrt(int num)
{
  
   if (num == 0 || num == 1)
   return num;
int x=num;
int y=(x+1)/2;
while(y<x)
{
x=y;
y=(x+num/x)/2;
}
return x;
}

int main()
{
   int x = 20;
   cout << Sqrt(x) << endl;
   return 0;
}

The input and output are provided in the screenshot below: