CPS 6, Ramm - Summer Semester I - 5/22/01 #4

Chapter 3: Program Design and Implementation

if Statement

    if ( test expression )
    {
        statement list
    }

if/else Statement

    if ( test expression )
    {
       statement list
    } 
    else
    {
       statement list
    }

if/else Examples:
- firstof3.cpp
Relational Operators

== equal to
> greater than
< less than
!= not equal to
>= greater than or equal to
<= less than or equal to
Value of Relational Operations
true = 1
false = 0
Logical Operators
- NOT !
Short Circuit Evaluation exhaust4.cpp
C++ Operator Precedence

! NOT
*, /, % mult, div, mod
+, - add, subt
<<, >> insert, extract
<, <=, >, >= LT, LE, GT, GE
==, != EQ, NE
&& AND
|| OR
=, +=, -=, *=, /=, %= assignment
When in doubt, parenthesize
Functions that Return Values
math.cpp
Writing Double Functions
tfuncts.cpp
Use Functions Like Variables
Writing string Functions
getgrade.cpp
getgradealt.cpp
Design Different "Curving" Functions
Writing Functions
Design Different "Curving" Functions
Look at numtoeng.cpp in Book
The string Member Functions
string demo = "Monday morning";
- Find: int find(string s)
  demo.find("y m") == 5 (not found: string::npos )