Unexpected error in a very simple program

[Nebur]

Hi everybody, I 'm new in C++ programming and when I was doing a program to extract the integer part of a number, and also write the directly superior integer to it, and the directly inferior integer to it. For example:

I: 4.5
O: 4 5 5

I use the module operation (%) to determine wheter the number is integer or not, but i get an error I think I should not be getting:

[Error] invalid operands of types 'float' and 'int' to binary 'operator%'

  #include <iostream>
using namespace std;

int main () {
	
	float d;
	cin >> d;
	
	int r = int(d);		// get integer part which will be used as inferior integer part
	int esup = r + 1;	// superior integer part
	int eprox;
	  	
	  if (d%r != 0) eprox = esup;		// determine wheter d is integer. If it isn't, his closest integer is superior integer..
	  else esup = r;					// if it is integer, the closest integer is his own integer part.
	  
	cout << r << " " << esup << " " << eprox << endl;
}

Thanks for reading!

[vlad from moscow]

Floating types have no operator %. This operator may be applied only for integral types.

[Chervil]

Take a look at floor, ceil and modf.
http://www.cplusplus.com/reference/cmath/floor/
http://www.cplusplus.com/reference/cmath/ceil/
http://www.cplusplus.com/reference/cmath/modf/