1.5.1. Exercises: Introduction to Functions

1.5.1. Exercises: Introduction to Functions
	1.5. Introduction to Functions

1.5.1. Exercises: Introduction to Functions

Locate the code for Example 1.3 in the src tree and then
- Build and test that program with a variety of input values, including some non-numeric values.
- Determine the largest input value that can produce a valid output.
- Can you change the program so that it can produce valid results for larger input values?
- Modify the program so that it cannot produce invalid results.
- Explore the effects of using the statement
```
 if (cin >> n)  {  ...  } 
```
  to enclose the processing of n in this program. In particular, try entering non-numeric data after the prompt. This is an example of the use of a conversion operator, which is discussed in more detail in Section 19.9.1.
- Modify the program so that it can accept values from the user until the value 9999 is entered.
Write definitions for the functions
```
  double toCelsius(double fahrenheitTemp);
  double toFahrenheit(double celsiusTemp);
```
and then write a program that enables the user to obtain temperature conversions (in either direction) between Celsius and Fahrenheit.

[ fromfile: cppintro.xml id: x-intro-functions ]


1.5. Introduction to Functions		1.6. `qmake`, Project Files, and `Makefile`