#include<iostream>
using namespace std;


// Pre-conditions: three initialized float variables input
// Post-conditions: the value in each input variable is
//                  decreased by 1
void decreaseByOne(float& num1,float& num2,float& num3);


int main()
{
 float num1, num2, num3;

 // Get three input numbers
 cout << "Enter three numbers: ";
 cin >> num1 >> num2 >> num3;

 // Decrease each variable value
 decreaseByOne(num1,num2,num3);

 // Print out new variable values
 cout << "Newly decreased numbers: "
      << num1 << " " << num2 << " "
      << num3 << endl;

 return 0;
}


// Decrease each variable value by one
void decreaseByOne(float& num1, float& num2, float& num3)
{
 num1-=1;
 num2-=1;
 num3-=1;
}