Return нескольких переменных

....
 cout<<"r1=";
  cin>>r1;
  cout<<"r2=";
  cin>>r2;
   cout<<"\nb=";
   cin>>b;
....

double put(double r1,double r2,double b){
 cout<<"r1=";
  cin>>r1;
  cout<<"r2=";
  cin>>r2;
   cout<<"\nb=";
   cin>>b;
 
return r1,r2,r3
}

double put(double x,char name[2]){
  cout<<name<<"=";
  cin>>x;
  return x;
}

double a=0,b=0,c=0;
put(a,b,c);
cout<<a<<b<<c;

void read(const char *request, double &ref) {
    std::cout << request;
    std::cin >> ref;
}
...
read("r1 = ", r1);
read("r2 = ", r2);
read("b = ",  b);

template<class T>
void read(const char *request, T &ref) {
    std::cout << request;
    std::cin >> ref;
}
...
int r1;
double r2;
std::string b;
read<int>("r1 = ", r1);
read<double>("r2 = ", r2);
read<std::string>("b = ",  b);

x = put(....);

#include <iostream>
#include <tuple>
 
auto treturn() {
    return std::make_tuple(1, 'x');
}
 
 
void test() {
    char c;
    std::tie(std::ignore, c) = treturn();
    std::cout << c << std::endl;
}
 
int main() {
    test();
    return 0;
}

    #include <iostream>
    
    using namespace std;
    struct X{  double x, y, z;};
 
 
   X put(double r1,double r2,double b){
     cout<<"r1=";
     cin>>r1;
     cout<<"r2=";
     cin>>r2;
     cout<<"\nb=";
     cin>>b;
     return {r1,r2,b};
    }
 
    int main(){
        double a,b,c;
 
        X x=put(a,b,c);
 
        cout<<x.x<<"  "<<x.y<<"  "<<x.z;
    }