CS201 RECITATION 1 Consider the following class

9/8/14
CS201 RECITATION 1
Part 1: Writing and debugging code with
CodeBlocks
Consider the following class
#include <string>
using std::string;
class GradeBook{
public:
GradeBook(string name){
setCourseName( name );
}
void setCourseName(string name){
if(name.length() <=25)
courseName = name;
else
courseName = name.substr(0,25);
}
string getCourseName(){
return courseName;
}
private:
string courseName;
};
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Let’s modify this GradeBook class such that
 It
keeps the midterm, final, homework, and quiz
grades of a particular student as its data members, and
 It
calculates a letter grade of that student using the
computeFinalGrade member function that
 Takes four input grades from the user
 Computes the average grade acc. to the following weights
  Midterm (30%), Final (35%), HW(15%), Quiz(20%)
Assigns a letter grade according to
      90 ≤ Grade
80 ≤ Grade ≤ 89
70 ≤ Grade ≤ 79
60 ≤ Grade ≤ 69
Grade < 60
Otherwise
:A
:B
:C
:D
:F
: U (unknown)
Let’s do it using CodeBlocks
   CodeBlocks is an integrated development environment.
http://sourceforge.net/projects/codeblocks.berlios/
Make sure you downloaded the IDE with its compiler
MinGW.
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NEW C++ PROJECT
NEW C++ PROJECT
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NEW C++ PROJECT
NEW C++ PROJECT
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NEW SOURCE FILE
NEW SOURCE FILE
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GRADEBOOK.CPP
GRADEBOOK.CPP
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GRADEBOOK.CPP
GRADEBOOK.CPP
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GRADEBOOK.CPP
GRADEBOOK.CPP
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GRADEBOOK.CPP
GRADEBOOK.CPP
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GRADEBOOK.CPP
GRADEBOOK.CPP
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GRADEBOOK.CPP
GRADEBOOK.CPP
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GRADEBOOK.CPP
GRADEBOOK.CPP
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GRADEBOOK.CPP
GRADEBOOK.CPP
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GRADEBOOK.CPP
GRADEBOOK.CPP
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GRADEBOOK.CPP
GRADEBOOK.CPP
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CS201 RECITATION 1
Part 2: Porting, compiling and testing in Dijkstra
FILEZILLA, OPEN SOURCE FTP
CLIENT
dijkstra.ug.bcc.bilkent.edu.tr
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Filezilla, open source ftp client
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PUTTY SSH CLIENT
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
Putty ssh client
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Putty ssh client
COMPILING C++ PROGRAMS WITH G++
 The
base command for the Gnu C++ compiler is
"g++"
 Single File Programs
 To compile a program that is in a single file, the
easiest compilation uses the command format:
g++ -o <outputName> <inputCodeFilename>
   Where the inputCodeFilename ends with ".cpp“
Example:
g++ -o myExe prog1.cpp
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MULTIPLE FILE EXAMPLE
 g++
 This command compiles and links the code files
"thing.cpp" and "main.cpp" together into the
executable program called "myProgram”.
 g++
 -o myProgram thing.cpp main.cpp
-o myProgram *.cpp
This command compiles and links all the code files
with ".cpp" extension.
COMPILING C++ PROGRAMS
WITH G++
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RUNNING YOUR PROGRAM
TYPES OF ERRORS
 Compilation
 usually syntax errors, undeclared variables and
functions, improper function calls.
 Linker
 errors
usually involve undefined functions or multiplydefined functions or symbols
 Run-time
  errors
errors -- two varieties:
Fatal -- cause program to crash during execution
Non-fatal (or logical) -- don't crash the program, but
produce erroneous results.
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DEBUGGING COMPILE STAGE
ERRORS
 Always
start at the top of the list of errors. Fix
the first error, then recompile and see what is
left.
 If a list of errors is too long, compile and debug
one file at a time.
 When searching for an error, start with the
indicated line number, but also look in the
vicinity (usually previous lines) for the possible
error.
 Compile portions of programs as you go -don't wait until the program is fully written
to do the first compile!
CS201 RECITATION 1
Part 3: Using header files
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BACK TO GRADEBOOK.CPP
Let’s try and separate this file into multiple files separating the
interface of the class from its implementation as well as
separating the user program that uses this code.
GRADEBOOK.H
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GRADEBOOK.H
GRADEBOOK.CPP
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MAIN.CPP
NECESSARY FILES
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UPLOAD WITH FILEZILLA
TEST WITH PUTTY
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