I wrote this program about four hours ago and everything but my if loop is working. I wrote a separate one in a test file and it works, for the life of me I can't get it to work in this program. When inputting anything other than a y or n it shuts down when it should ask for a valid input like y or n. Any help would be appreciated.

```
#include<iostream>
#include<cmath>
//Function declarations.
void getinput(double& feet,double& inches);//Asks for the input from the user.
void metconv(double feet,double inches,double& meters,double& cm);//The function that converts feet and inches to meters and centimeters.
void printOutput(double meters,double cm);//Prints out the data after the calculations have been made.
const double meters_per_foot = 0.3048;//Constant for meters in a foot.
char getResponse();//This will rerun or terminate the program based on the users input.
using namespace std;
int main()
{
double feet,inches,meters,cm;//Variables for the program.
char yes_no = 'y';//Variable for the response to rerun or terminate loop.
do//Beginning of the do-while loop.
{
getinput(feet,inches);//This displays the user prompts for the getinput function.
metconv(feet,inches,meters,cm);//This will display the information that is processed for the conversion function.
printOutput(meters,cm);//This is display the total meters and centimeters.
yes_no = getResponse();
}while(yes_no == 'y');//End of the do-while loop.
return 0;
}
void getinput(double& feet,double& inches)//This function gathers the needed requirments of feet and inches.
{
using namespace std;
cout << "\nPlease enter the feet length: ";
cin >> feet;//This will be used for thecalcultions.
cout << "\nPlease enter the inches length: ";
cin >> inches;//This will be used for thecalcultions.
return;
}
void metconv(double feet,double inches,double& meters,double& cm)//This is the conversion function that will convert the feet and inches into meters and centimeters.
{
using namespace std;
double cominches,commeters;//These variables are local to this function.
cominches = (feet * 12) + inches;//This algorithm converts feet into inches.
commeters = (cominches / 12) * meters_per_foot;//This algorithm divides the totaled inches by 12 and then multiplies it by the number of meters in a foot.
double number = commeters;//This sets number equal to commeter to use in the modf function. Allowing the algorithm to operate properly.
cm = modf(number, &meters) * 100;//This is the modf function that splits the number with a decimal into two variables.
}
void printOutput(double meters, double cm)//This is the function that prints out the output of the conversion function. Using meters and centimeters.
{
using namespace std;
cout <<"\nThe conversion is " << meters << " meters and " << cm << " centimeters total." << endl;
}
char getResponse()
{
char c;
do
{
cout << "Do you want to continue? (y for yes, n for no): ";
cin >> c;
if (c != 'y' && c != 'n' )
cout << "Invalid input, enter y or n" << endl;
}while(c != 'y' && c != 'n');
return c;
}
```