C++ program for use of function

#include <iostream>
using namespace std;
void Add(float, float, float);
int main()
{
    float f1,f2,f3;
    cout<<"Enter three float numbers:"<<endl;
    cin>>f1>>f2>>f3;
    Add(f1,f2,f3); //actual arguments
    return 0;
}
void Add(float x, float y, float z)
{
    float sum=x+y+z;
    cout<<"The sum is: "<<sum;
}

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