Day 4

• Reading: Read through Chapter 5 by Thursday
• Project 2 assigned
• Lab 3 assigned today
• Lecture Topics
• if/then/else
• compound statements/blocks use braces
• conditions
• relational and equality operators: <, >, <=, >=, ==, !=
• logical operators: &&, ||, !
• Example: write a function that returns the smallest of three numbers

int getSmallest(int num1, int num2, int num3)
{
     int smallest;
     smallest = num1;
     if (num2 < smallest) {
          smallest = num2;
     }
     if (num3 < smallest) {
          smallest = num3;
     }
     return smallest;
}

• Example: write a function that returns 'B' if two numbers are either equal or both are negative, and returns 'G' otherwise
• Example: write a function that prints "Good job!" if a score is above 90, "Amazing!" if a score is above 95, and "Wow!" if a score is above 98
• using 0 as false, 1 (or any nonzero value) as true
• Example: write a function that determines if a number is odd
• operator precedence (Table 4.6 p. 162 in book)
• short-circuit evaluation
• complementing a condition: !(x == 4) ====> x != 4, or !(x < 4) ====> (x >= 4)
• DeMorgan's Theorem (p. 168 in text)
• switch
• Example: write a function to print the day of the week name, given the first char
• Example: write a program that reads up to three item prices, calculates their sum, gives a discount of 10% if the sum is over $100, and 15% if the sum is over $500, then adds 8.75% sales tax, finally printing the total, discounted total, tax, and final bill. Ask the user if they want to enter another item. If they enter a negative item price, give them a second chance to enter the item price.
• Write header comment
• Write main and makefile
• Write testCases() with one test
• Write a function to make test pass
• Write a second test
• Revise function to make tests pass
• Refactor
• Write I/O in main()