Value-Returning Function Debug Error - C++ - c++

Question

I am in a beginner C++ course. Here are the instructions for my assignment:
Write a program that calls a value-returning function that prompts the user to enter the weight of a person in pounds and then calls another value returning function to calculate the equivalent weight in kilograms. Output both the weights rounded to two decimal places. (Note that 1 kilogram = 2.2 pounds.) Format your output with two decimal places.
I thought everything was perfect. However, I am a getting a debug error, which is Runtime Check Error #3 - T. Please review my code and tell me what is wrong here. Remember, I am a beginner. Thank you.
#include <iostream>
#include <string>
#include <iomanip>
#include <fstream>
using namespace std;
string get_date();
void student_heading();
float get_user_input(float);
float convert_weight(float);
int main()
{
cout << fixed << showpoint << setprecision(2);
string mydate;
float weight_lbs;
float weight_kgs;
mydate = get_date();
student_heading();
weight_lbs = get_user_input();
weight_kgs = convert_weight(weight_lbs);
return 0;
}
string get_date()
{
string mydate;
cout << "Enter today's date:";
getline(cin, mydate);
return mydate;
}
void student_heading()
{
cout << "*******************" << endl;
cout << "Student" << endl;
cout << "ID Number" << endl;
cout << "SYCS-135" << endl;
cout << "Assignment 6" << endl;
cout << "October 6, 2015" << endl;
cout << "******************" << endl;
}
float get_user_input(float lb_weight)
{
cout << "Please provide us with your weight, in pounds:";
cin >> lb_weight;
return lb_weight;
}
float convert_weight(float kg_weight)
{
float lb_weight;
kg_weight = lb_weight / 2.2;
return kg_weight;
}

Answer 1

Your error is that you are calling weight_lbs = get_user_input();
You cant call get_user_input with no argument because you do not have any function like that.

Answer 2

Your code has several issues.
Your function prototypes are not correct. The parameter in the braces have to contain the variable name as well as data type. So only function(int) is not enaugh, it should be function(int MyVariable). So the error was caused by calling function, which didn't exist, because your function prototype was not correct (expected a parameter).
Your get_user_input() function has a parameter which is not needed. The whole function should look like this:
float get_user_input()
{
cout << "Please provide us with your weight, in pounds:";
float lb_weight;
cin >> lb_weight;
return lb_weight;
}
Function for mass conversion can look like this:
float convert_weight(float lb_weight)
{
return lb_weight / 2.2;
}
Your main function then should look like this:
int main()
{
cout << fixed << showpoint << setprecision(2);
string mydate;
float weight_lbs;
float weight_kgs;
mydate = get_date();
cout << mydate << endl;
student_heading();
weight_lbs = get_user_input();
weight_kgs = convert_weight(weight_lbs);
cout << weight_kgs << "Kg";
getchar();
getchar();
return 0;
}
Don't forget to change the function prototypes to:
float get_user_input();
float convert_weight(float lb_weight);