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I think there may be a math error in my program and I may not be seeing it. Is it possible for someone to go over it just to make sure it is ok. I have done everything I could think of to try to fix it, but it is eluding me. Thanks. I think the problem is near line 121.

```
#include<iostream>
#include<cmath>
void printMenu();//Function to get information from user
void getInputS(double& feet,double& inches);//Gathers the feet and inches from the user.
void getInputM(double& meters,double& cm);//Gathers the meters and centimeters from the user.
void standtometcon(double& feet,double& inches,double& meters,double& cm);//Declaration for standard conversion.
void mettostandcon(double& feet,double& inches,double& meters,double& cm);//Declaration for Metric conversion.
void printOutput(double& feet,double& inches);//Prints out the data after the calculations have been made.
void printOutput1(double& meters,double& cm);//Prints out the data after the calculations have been made.
const double meters_per_feet = 0.3048;//Constant for meters per foot.
const double feet_per_meter = 3.2808398950131235;//Constant for feet in a meter.
char getResponse();//Function that will ask the user to decide about repeating the program.
int main()
{
//Variables for the program.
double feet,inches,meters,cm;//Variables for the program.
char rerun;
do//Beginning of the do-while loop.
{
printMenu();//The only function call in the entire program that exists in the main body.
}while (rerun == 'y'); //End of do-while loop.
return 0;
}
void printMenu()//This function gathers the needed requirments of feet and inches. It also calls all other functions that are used in this function other than itself.
{
using namespace std;//Used per function no longer used globally.
//Variables that are used locally in this function.
int response = 0;
double feet, meters, inches, cm;
char rerun;
do//Do-while loop that begins the if-else loop.
{
//These two cout statements asks the user which conversion he or she would like to perfom.
cout << "\nPress 1 to convert from standard to meteric: "<< endl;
cout << "\nPress 2 to convert from meteric to standard: "<< endl;
cout << endl;
cin >> response;
//Beginning of if-lse loop that encompasses most of the work that this program performs.
if( response == 1)
{
cout << "\nThis is where we convert from standard to meteric." << endl;//This staes to the user which conversion will take place.
getInputS(feet,inches);//This is the function call that calls the function that gathers the information needed to determine meters and centimeters from feet and inches.
standtometcon(feet,inches,meters,cm);//This is the function call that calls the function that converts the units from standard to meters.
printOutput(meters,cm);//This is the function call that calls the function to print out the results.
rerun = getResponse();//This is the function call that calls the funtion that asks if the user wants to repeat the program.
return;
}
else( response == 2);
{
cout << "\nThis is where we convert from meteric to standard." << endl;//This staes to the user which conversion will take place.
getInputM(meters,cm);//This is the function call that calls the function that gathers the information needed to determine feet and inches from meters and centimeters.
mettostandcon(feet,inches,meters,cm);//This is the function call that calls the function that converts the units from meters to standard.
printOutput1(feet,inches);//This is the function call that calls the function to print out the results.
rerun = getResponse();//This is the function call that calls the funtion that asks if the user wants to repeat the program.
return;
}
}while(response == 1 || response == 2);//End of do-while loop
return ;
}
void getInputS(double& feet,double& inches)//Function definition for get input for feet and inches. It asks the user to input the number of feet and inches.
{
using namespace std;//Used per function no longer used globally.
cout << "\nPlease enter the amount of feet: ";
cin >> feet;
cout << "\nPlease enter the amount of inches: ";
cin >> inches;
cout << endl;
return;
}
void standtometcon(double& feet,double& inches,double& meters,double& cm)//This is the function definition for the standard to meteric conversion.
{
using namespace std;//Used per function no longer used globally.
double cominches,commeters;//These variables are local to this function.
cominches = (feet * 12) + inches;//This algorithm converts feet into inches by multiplying feet by 12 and then adding the additional inches.
commeters = (cominches / 12) * meters_per_feet;//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. EX. 3.12345 = 3.00000 + 0.12345
/*
Testing the algorithm to get accurate numbers from program.
cout << feet << " feet and " << inches << " inches"<< " and " << meters << " and " << cm << endl;
cout << cominches << " = cominches" << endl;
cout << commeters << " = commeters" << endl;
cout << number << " = number" << endl;
cout << cm << " = cm" << endl;
cout << meters << " = meters" << endl;
*/
return;
}
void getInputM(double& meters,double& cm)//This function gathers the users input for meters and centimeters.
{
using namespace std;//Used per function no longer used globally.
cout << "\nPlease enter the amount of meters: ";
cin >> meters;
cout << "\nPlease enter the amount of centimeters: ";
cin >> cm;
cout << endl;
return;
}
void mettostandcon(double& feet,double& inches,double& meters,double& cm)//This is the function that will convert meteris into standard.
{
using namespace std;//Used per function no longer used globally.
double comcm,comfeet;//These variables are local to this function.
comcm = (meters * 100) + cm;//This algorithm converts meters into centimeters by multiplying meters by 100 and then adding the additional centimeters.
comfeet = (comcm / 100) * feet_per_meter;//This algorithm divides the totaled centimeters by 100 and then multiplies it by the number of feet in a meter.
double number = comfeet;//This sets number equal to comfeet to use in the modf function. Allowing the algorithm to operate properly.
inches = modf(number, &feet);//This is the modf function that splits the number with a decimal into two variables. EX. 3.12345 = 3.00000 + 0.12345
/*
Testing to get accurate numbers from program.
cout << feet << " feet and " << inches << " inches"<< " and " << meters << " and " << cm << endl;
cout << comcm << " = comcm" << endl;
cout << comfeet << " = comfeet" << endl;
cout << number << " = number" << endl;
cout << inches << " = inches" << endl;
cout << feet << " = feet" << endl;
*/
return;
}
void printOutput(double& meters,double& cm)//This function will print out the results of the convers from standard to meteric.
{
using namespace std;//Used per function no longer used globally.
cout <<"\nThere are " << meters << " meters and " << cm << " centimeters total." << endl;
cout << endl;
return;
}
void printOutput1(double& feet,double& inches)//This function will print out the results of the convers from meteric to standard.
{
using namespace std;//Used per function no longer used globally.
cout <<"\nThere are " << feet << " feet and " << inches << " inches total." << endl;
cout << endl;
return;
}
char getResponse()//This is the function that will ask for input from the user so the program will either rerun of terminate..
{
using namespace std;//Used per function no longer used globally.
char response,rerun;//Local variables to this function.
do//Beginning of the do-while loop.
{
cout << "\nDo you want to continue? (y for yes, n for no): ";//Prompt asking if continuation is wanted.
cin >> response;
if (response != 'y' && response != 'n' )//The if-loop to make sure the user inputs a y or n to get appropriate input.
{
cout << "\nInvalid input, enter y or n" << endl;//Output asking user to make sure to use correct input.
}
else if (response == 'y')
{
printMenu();//If user chooses y then the program will rerun.
}
else
{
cout << "\nGoodbye!";//If user chooses n then program terminates.
}
}while(response != 'y' && response != 'n');
response = rerun;
return rerun;
}
```

*Edited 6 Years Ago by jmcorpse*: n/a