com fazer a raiz quadrada em c 2b 2b

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}