I don't understand

Im currently learning programming, i just made this in c++ but i don't understand whats wrong with it :
#include "stdafx.h"
#include <iostream>
using namespace std;
#include <cmath>
#include <stdio.h>

int NMBR;
float racx = squr 'x';
float x;
float squr;


int main()
{
cout << "I will find your square root";
cin >> x;
cout << "the square root of" 'x' "is" racx;
cout << "end of program";

return 0;