funkcja

#include <iostream>

using namespace std;

float na_cale(float m)
{
    return m*39.37;
}

float na_jardy(float m)
{
    return m*1.0936;
}

void na_mile(float m)
{
    //float wynik=m*.0006213;
    //cout<<"W calach: "<<wynik <<endl;

    cout<<"W calach: "<< m*.0006213<<endl;
}

int main()

{
    float metry;
    cout << "Podaj liczbe metrow: " ;
    cin>>metry;

    cout<<"W calach: "<<na_cale(metry)<<endl;
    cout<<"W milach: "<<na_jardy(metry)<<endl;

    na_mile(metry);


    return 0;
}