sqrt in c 2b 2b

1#include <cmath>
2sqrt(x);

1#include <math.h>
2
3//get square root of a number "b"
4int main(){
5  	int a = 2; //declare number you want to take square root of
6  	int sqrtNum = sqrt (a); //assign the sqrt value to a variable
7  	cout << sqrtNum << endl;
8	return 0;
9}

1#include <stdlib.h>
2#include <stdio.h>
3#include <math.h>
4
5/*
6square root of a number
7*/
8
9int main(){
10float num, raiz;
11printf("enter a number: \t");
12scanf("%f",&num);
13raiz = sqrt(num);
14printf("The square root of %f is: %f.\n", num, raiz);
15system("pause");
16return 0;    
17}

1#include <iostream>
2#include <cmath>
3using namespace std;
4
5int main()
6{
7	int x = 625;
8	int result = sqrt(x);
9	cout << "Square root of " << x << " is " << result << endl;
10	return 0;
11}