error message

[newyork23]

I get an error saying lost in scope dist0 and dist1. I'm lost on where to fix this code. My guess is the functional declaration. Any thoughts?

#include <iostream>
#include <iomanip>
using namespace std;

void meet(const double d, const double v0, const double v1, const double &time, const double &distance0, const double &distance1); //Function Declaration goes here


int main(void)
{
	double d, v0, v1, time, distance0, distance1;

	cout << "Enter d, v0, v1: ";
	cin >> d >> v0 >> v1;

	meet(d, v0, v1, time, distance0, distance1);

	cout << fixed << setprecision(3);
	cout << "Time is " << time << " distance0 is " << distance0
		<< " distance1 is " << distance1 << endl;

	return 0;
}


void meet(const double d, const double v0, const double v1, const double &time, const double &distance0, const double &distance1)// First line of the function goes here
{
	time = d / (v0 + v1);
	dist0 = v0 * time;
	dist1 = v1 * time;
}

[Hengry]

You never declared dist0 or dist1. In your function parameter, you have defined distance0 and distance1, not dist0 and dist1.

[JLBorges]

Since the intent is to set values to the arguments passed by reference, they should not be references to const.

Ideally, if we want to const-qualify parameters passed by value, do that only in the definition.

#include <iostream>
#include <iomanip>

void meet( double d, double v0, double v1, // passed by value
           double &time, double &distance0, double &distance1 ); // modifiable references
                                                                 // the function would write into these

int main()
{
    double d, v0, v1 ;

    std::cout << "Enter d, v0, v1: ";
    std::cin >> d >> v0 >> v1;

    if( d >= 0 && (v0+v1) > 0 )
    {
        double time, distance0, distance1;
        meet( d, v0, v1, time, distance0, distance1 );

        std::cout << std::fixed << std::setprecision(3)
                  << "Time is " << time << " distance0 is " << distance0
                  << " distance1 is " << distance1 << '\n' ;
    }

    else std::cerr << "invalid input\n" ;
}


void meet( const double d, const double v0, const double v1,
           double &time, double &dist0, double &dist1)
{
    time = d / (v0 + v1);
    dist0 = v0 * time;
    dist1 = v1 * time;
}