Take 2 float numbers and check 3 digits after decimal places if same then print Equal if not Not

++
#include <iostream>
#include <iomanip> 
#include <string>

bool check_equal(float a, float b){
  
  if(std::to_string(a).substr(4,7).compare(std::to_string(b).substr(4,7)) == 0)
    return 1;
  else
    return 0;
}

int main() {

	float a, b;
	std::cout << std::fixed;
  	std::cout << std::setprecision(7);
  	std::cin>>a>>b;
  	std::cout << std::boolalpha << check_equal(a,b);
}