The goal of this exercise is to study functions, operator precedence, and the truncation effect of integer division. The following formulas convert a temperature in Fahrenheit (F) to its equivalent in Celsius (C) and vice versa.

For example, 77 degrees F is 25 degrees C, as shown:5 C = --- (F - 32) 9 9 F = --- C + 32 5

Using the second formula, we see that 25 degrees C is 77 degrees F:5 5 C = --- (77 - 32) = --- (45) = 25 9 9

9 F = --- (25) + 32 = 45 + 32 = 77 5

- Write the following assignment statment on paper in C++
code, so that the division will be performed first:
`5 C = --- (F - 32) 9` - In integer divsion, what is 5/9?
- In view of your answer to step 2, what can you conclude about the assignment statement you constructed in step 1? What value does it assign to C?
- To minimize the effect of division truncation, rearrange the expression on the right hand side of the assignment operator so that multiplication occurs before division.
- Make a file called
`lab031.cpp`from the program you see when you click here. - Program lab031.cpp reads a temperature in Fahrenheit and calculates the
corresponding integer Celsius temperature. Fill in the body of
function
`F_to_C()`with C++ code to make it do the correct thing. Don't forget that you need to have a return statement at the end of`F_to_C()`. Without the return statement,`F_to_C()`cannot give its result to its caller. - Test program lab031.cpp by running it several times, giving it a different input each time, and checking the answers it gives either with an electronic calculator or with hand calculations.
- Think about how you would write this assignment statement in C++ to
minimize the effect of division truncation:
`9 F = --- C + 32 5` - Add to the program lab031.cpp a prototype and definition for a function
`C_to_F()`that inputs an integer parameter Celsius and returns the corresponding integer Fahrenheit temperature. Base the code in the body of this function on the C++ assignment you worked up in step 8. - Add statements in
`main()`to read a measurement in Celsius, call`C_to_F()`to make the conversion to Fahrenheit, and print the Fahrenheit temperature. - As you did in step 7, test the program now with several values and check the results.
- When you are sure everything is working correctly, make a script showing the program working on all the input values of step 11.
- E-mail me a copy of the program source code (the file lab031.cpp) with
subject line
**"cs1500,lab03,source"**. (Refer to the directions of the "*Hello World!*" assignment if you need help with the directions for sending the e-mail.) - E-mail me a copy of the script with subject line
**"cs1500,lab03,script"**.

I'd like everyone to get finished and e-mail the source and script by the end of the 50 minutes alloted for the lab.