convertir Kelvin à Fahrenheit

#include<iostream>
using namespace std;
float program(float mamo);
int main()
{
	float kalvin;
	float fahrenhiet;
	cout<<"Please Enter your Tem in Kelvin=";
	cin>>kalvin;
	fahrenhiet=program(kalvin);
	cout<<"\nFahrenhiet="<<fahrenhiet<<".F"<<endl;
	return 0;
}
float program(float kalvin)
{
	float fahrenhiet;
	fahrenhiet=(9/5*(kalvin-273.15)+32);
	return fahrenhiet;
}
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