Table of Contents
Part 2
Entries
Entry 5: 3/6/2012
Today in C/C++ we started to look at stuff in C++ for the first time. I learned that C++ is backwards compatible with C. I also learned that C++ is a object oriented programming language, and can be more easily managed.
- C++ is backwards compatible with C.
- all the programs i have written in C can be compiled and run with C++
Entry 6: 3/8/2012
Today in C/C++ we took a look more at C++, i learned that you save your files with .cc rather than .c. Also i learned that you compile your code with G++ rather than with gcc.
- compile with G++, save code with .cc
- if your code isnt saved in the right format it wont compile with the right compiler.
- public, privite
Entry 7: 3/13/2012
Today in C/C++ we looked more at concept in C++, we spent some more time with public and private concepts. I learned that you can access things that are private by using a var that is public that can access the private vars.
- public and private
- you cant access vars that are put in private if you are outside of the boundaries.
- public and private
Entry 8: 3/15/2012
We have been looking more at C++ code, and we have been learning some concepts such as inheritance. I have learned that child classes can inherit things from parent classes
- inheritance
- its important to understand the relationship between the classes
Keywords
cprog Keywords
(compiler)
compiler
Definition
a computer program that takes a file written in source code and changes it into a different computer language to run the program.
Demonstration
Demonstration of the chosen keyword.
If you wish to aid your definition with a code sample, you can do so by using a wiki code block, an example follows:
gcc -o file file.c
(Preprocessor)
Preprocessor
Definition
a program that processes source code before its gets compiled.
Demonstration
(Assembler)
Assembler
Definition
a program that changes assembly language into computer language.
(Return Types)
Return Types
Definition
a function that needs to be put at the end of a method, that tells the computer what to return.
Demonstration
Demonstration of the chosen keyword.
If you wish to aid your definition with a code sample, you can do so by using a wiki code block, an example follows:
#include <stdio.h> int main() { return(0); }
(inheritance)
inheritance
Definition
a way to re-use code, from higher up classes
(public class)
public class
Definition
a class in C++ programming that all entities can access.
(private class)
private class
Definition
a class in C++ programming that only variable in defined in the private class can access, unless a pointer is used.
(multi-file program)
multi-file program
Definition
a program that is broke up into multiple header and .cc files, that are all brought together in main.cc
cprog Objective
cprog Objective
-write and compile code that utilizes programming constructs -use pointers and variables to discover the indirect properties of data storage -comprehend the basics of memory management, data representation and storage -identify and label various data types as scalar vs. composite -distinguish and explain difference between homogeneous and heterogeneous composite data types -break down and separate code into functions and illustrate the use of parameter passing -justify the use of various programming constructs within code solutions -discover the standard libraries and use libraries in solving problems
Definition
students should be able to -Write programs -use pointers effectively -understand what memory management is. -use the different data types -use the different libraries to do what your trying to do
Method
I will be measuring my success in this class on whether or not i will be able to complete the projects.
Measurement
According to my method, i am understanding the basics of what i need to do, but when it comes to putting it all together in a programs by my self, i am only able to do about have of it. I end up needing to get assistance from Matt or class mates.
Analysis
Reflect upon your results of the measurement to ascertain your achievement of the particular course objective.
- i am doing pretty good
- there is definitively room for improvement
- i think my method is a pretty good way to measure success
Experiments
Experiment 4
Question
What would happen if i changed the “” around the printf statement in the Hello World program to ''?
Resources
From some resources on Wikipedia, if i were to run the program with single quotes instead of double quotes it would segfault
Hypothesis
I think that the program will have some warnings compiling the code (do not know what problems in specific) and will have a segmentation fault when i go to run it.
Experiment
To test this i am going to replace printf(“Hello, World!\n”) with printf('Hello, World!\n'). compile and run
Data
When i change out the quotations, the compiler says “ warning: character constant too long for its type hello.c: In function 'main': hello.c:3: warning: passing argument 1 of 'printf' makes pointer from integer without a cast /usr/include/stdio.h:339: note: expected 'const char * restrict' but argument is of type 'int'”. And then it seg faults when i run it.
Analysis
Based on the data collected:
- Was your hypothesis correct? Yes it was
- Is there more going on than you originally thought? yes
Conclusions
I have concluded that one little syntax error can totally change what the program thinks you want to do.
Experiment 5
Question
Can i use both printf and cout statements within the same code?
Resources
c++ pocket reference
Hypothesis
Based on what i have been reading in the C++ pocket reference, most c code can be used in a c++ program, compiled with G++. My hypothesis is that i can use both printf and cout statements in the same code provide it is compiled as C++.
Experiment
I am going to write a program in C++ and compile it in C++ and use both a printf and cout statement.
Data
The program compiled fine and ran fine with mixing both printf and cout statements.
Analysis
Based on the data collected:
- Was your hypothesis correct? yes my hypothesis was correct
Conclusions
I can conclude that C++ is backwards compatible with C provided u include the correct header files.
Retest 2
Perform the following steps:
State Experiment
Whose existing experiment are you going to retest? Provide the URL, note the author, and restate their question.
Resources
Evaluate their resources and commentary. Answer the following questions:
- Do you feel the given resources are adequate in providing sufficient background information?
- Are there additional resources you've found that you can add to the resources list?
- Does the original experimenter appear to have obtained a necessary fundamental understanding of the concepts leading up to their stated experiment?
- If you find a deviation in opinion, state why you think this might exist.
Hypothesis
State their experiment's hypothesis. Answer the following questions:
- Do you feel their hypothesis is adequate in capturing the essence of what they're trying to discover?
- What improvements could you make to their hypothesis, if any?
Experiment
Follow the steps given to recreate the original experiment. Answer the following questions:
- Are the instructions correct in successfully achieving the results?
- Is there room for improvement in the experiment instructions/description? What suggestions would you make?
- Would you make any alterations to the structure of the experiment to yield better results? What, and why?
Data
Publish the data you have gained from your performing of the experiment here.
Analysis
Answer the following:
- Does the data seem in-line with the published data from the original author?
- Can you explain any deviations?
- How about any sources of error?
- Is the stated hypothesis adequate?
Conclusions
Answer the following:
- What conclusions can you make based on performing the experiment?
- Do you feel the experiment was adequate in obtaining a further understanding of a concept?
- Does the original author appear to have gotten some value out of performing the experiment?
- Any suggestions or observations that could improve this particular process (in general, or specifically you, or specifically for the original author).