CS1372 Fall 2006
HW 02 – Conditionals and for loops
The aim of this introductory assignment is for you to familiarize yourself with data types,
conditional statements and for loops.
A basic Visual Studio Solution is accessible to you on the class web site as a zip file. Use this
for the environment for solving the following problems.
The Assignment
The assignment is for you to program one C program that does the following:
1. Demonstrates the behavior of C programs with different data structures
2. Converts a numerical grade as a percentage to a letter grade
3. Wraps the conditional code in a for loop.
The program must:
• Use one file only – name it basic.cpp
• Compile (very important – you get 0 if it doesn’t compile)
• Have a “main” function and have no other functions
• Use
printf to output text to the screen, NOT cout or fprintf.
• Implement all three parts of the assignment within the “main” function
• Return properly
Part 1 – Verify the behavior of C data types
• Create the integer variables i1 and i2 with values 5 and 8 respectively.
• Compute i2/i1, cast it to double and print the result with two decimal places of precision.
• Now cast I2 to double before doing the division, and print the result. Make sure you
understand the behavior. Write a block comment explaining the difference in output.
Part 2 – Convert a random numerical grade to a letter grade
• Use the code fragment below to understand how to generate a random number (an
integer in the range 0 to RAND_MAX.
• Modify the code fragment to generate a grade as a random number between 50 and 100.
