Daniel McKinney's Opus
My name is Daniel McKinney, i am in the computer science program at CCC. I have already obtained an associate in Busn Admin. I spend most of my free time playing Xbox, GamerTag(iAM Beastly x), listening to music,or working out.
I am learning a lot in c/C++ programming class. We have written a few simple programs that are allowing me to understand the syntax of the programming language. I am also learning some symbols and how to use them and what they do. Also i have found out that there is not only one way to go about writing a program, there are many different approaches. over all the class is fun so far, and i am learning alot.
We wrote a program in C/C++ class that was pretty cool. First we put some random number into a text file. Then we wrote a program that would read form that file and then multiply those numbers by a predetermined amount and then write the product into another text file. We used both an “if” statement and a “while” statement.
Today we wrote a program in C/C++ that was basically a calculator(a calculator that could only add). We started the program out by declaring 4 int's. a,b,c,d. then we set them to 0.Then we used the sum function to add them all up for us after we prompted the user to enter 4 numbers.
Today in C/C++ Matt went over some of the problems that people were having with the secret agent project. It brought to light some things that i was having problems with. I got my program to cipher and decipher, but if the letter was a “z” then it would do a non alphabetic symbol.
Standard I/O
Standard In and Standard Out. Standard In is usually the key board, standard out is usually the monitor.
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:
/* * Sample code block */ #include <stdio.h> int main() { printf("dafsf"); scanf("fda"); return(0); }
Header files
are files that are include in the main file, that have data in another file.
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:
/* * Sample code block */ #include <stdio.h>
pointers
pointers are used to refer to a memory location of another variable, with out using that variable identifier.
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:
/* * Sample code block */ #include <stdio.h> int *chicken int main() { return(0); }
variables
variables are place holders for a values that are in memory.
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:
/* * Sample code block */ #include <stdio.h> int chicken char turkey int main()
scope
place in the declaration where a variables name can be used
array
a way of organizing a collection of related data, using a variable name
type casting
making a one type of variable act like another type of variable for a single operation.
arithmetic
(+)(-)(*)(/)(%)
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:
/* * Sample code block */ #include <stdio.h> int main() { return(0); }
Alternatively (or additionally), if you want to demonstrate something on the command-line, you can do so as follows:
lab46:~$ cd src lab46:~/src$ gcc -o hello hello.c lab46:~/src$ ./hello Hello, World! lab46:~/src$
Upon completion of this course, students will be able to:
-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
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
I will be measuring my success in this class on whether or not i will be able to complete the projects.
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.
Reflect upon your results of the measurement to ascertain your achievement of the particular course objective.
What would happen if i left the \n off of a printf statement?
According to resources on wikipedia, \n is used to space lines when a program is being run.
I think that if i leave the \n off of a printf, that the result will look cluttered and will join lines together.
I am going to test this experiment by writing a simple “hello world” program and leave the \n off of it
When i take the \n off of “Hello World!\n” the command prompt is jammed right after Hello World!
Based on the data collected:
I conclude that if you want organized program and want to be able to easily read your stdout statements you need to properly place \n to break up your lines.
What will happen if i remove the return(0); from a simple Hello, world program?
According to people on wikipedia, unless you declare something to be void, then you have to return something.
I think that if i take the return(0); off of the Hello World program that if will either not compile or that it will seg fault.
I am going to erase the return(0); from the Hello World program and attempt to compile it.
When i erase the return(0); from the program and compile it, it does not seg fault, it compiles fine, and runs fine.
Based on the data collected:
I have concluded that in my Hello World program, that not having a return statement does not affect it, i am assuming that is because all the program is doing it printing a statement, it is not dealing with any functions that would have values. (sound like Another Experiment?)
What would happen if i erased the header file <stdio.h> from the Hello World program
I have been reading on Wikipedia, that stdio.h includes the input and output functions for c programming.
I think that if i take off the stdio.h header file from the Hello World program, that it will not compile, and tell me that it does not know what printf function is.
To test this Experiment i am going to remove the stdio.h header file and compile the remainder of the code.
When i removed the header file stdio.h the compiler gave me a warning that said “ warning: incompatible implicit declaration of built-in function 'printf'” but the program still ran correctly.
Based on the data collected:
I have concluded that depending on what functions you want to use in your programming you need to include the proper header files.
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.
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.
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.
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
compiler
a computer program that takes a file written in source code and changes it into a different computer language to run the program.
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
a program that processes source code before its gets compiled.
Assembler
a program that changes assembly language into computer language.
Return Types
a function that needs to be put at the end of a method, that tells the computer what to return.
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
a way to re-use code, from higher up classes
public class
a class in C++ programming that all entities can access.
private class
a class in C++ programming that only variable in defined in the private class can access, unless a pointer is used.
multi-file program
a program that is broke up into multiple header and .cc files, that are all brought together in main.cc
-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
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
I will be measuring my success in this class on whether or not i will be able to complete the projects.
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.
Reflect upon your results of the measurement to ascertain your achievement of the particular course objective.
What would happen if i changed the “” around the printf statement in the Hello World program to ''?
From some resources on Wikipedia, if i were to run the program with single quotes instead of double quotes it would segfault
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.
To test this i am going to replace printf(“Hello, World!\n”) with printf('Hello, World!\n'). compile and run
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.
Based on the data collected:
I have concluded that one little syntax error can totally change what the program thinks you want to do.
Can i use both printf and cout statements within the same code?
c++ pocket reference
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++.
I am going to write a program in C++ and compile it in C++ and use both a printf and cout statement.
The program compiled fine and ran fine with mixing both printf and cout statements.
Based on the data collected:
I can conclude that C++ is backwards compatible with C provided u include the correct header files.
Perform the following steps:
Whose existing experiment are you going to retest? Provide the URL, note the author, and restate their question.
Evaluate their resources and commentary. Answer the following questions:
State their experiment's hypothesis. Answer the following questions:
Follow the steps given to recreate the original experiment. Answer the following questions:
Publish the data you have gained from your performing of the experiment here.
Answer the following:
Answer the following:
we have been doing some multi- file program examples in class. Doing multi file programs keep your code more organized. It takes longer and uses more over head to use muli-file programs.
In class we have been learning about multi-file programs, and in order to do that you need to create .o files. I learned you have to make a .h file w/ a corresponding .cc file, in order to get a .o file. then include that header file in your program using “” instead of <>
Today in C/C++ class we learned a little more about classes. We talked about the “friends” class. I learned that kids cannot access their parents private parts, but friends can access their parents private parts.
today in C/C++ class Matt reviewed a little bit about forms. Forms cannot be used for every thing, but if you are in a situation where a form could be used it will save a lot of time, and code.
protected class
protected base class can be accessed by a friend or member of any class by using a pointer to reference it.
friends class
can declare an external function as friend class to get access to the private and protected parts of the class
polymorphism
polymorphism is making a variable, objects, or function have more than one form.
File Access
accessing a file out side of the program to use by, and either reading, writing, or appending that file. to read you put “r” to write you put “w”
command line arguments
an argument sent to a program being called. usually you type in the command prompt the name of the program followed by you command line argument like a file.
Demonstration of the chosen keyword.
lab46:~$ ./test file.csv
cin
in C++ found in the header file iostream, overloads the left bit-shifter operator. usually takes info from user through keyboard. syntax is »
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:
/* * Sample code block */ #include <iostream> int main() { cin>>x>>y: return(0); }
cout
in C++ found in the header file iostream, overloads the right bit-shifter operator. standard out put is usually the screen. syntax is «
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:
/* * Sample code block */ #include <iostream> int main() { cout<<"this is going to the screen"<<"\n"; return(0); }
cerr
in C++ found in the header file iostream. The error output, normally the screen. syntax is «
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:
/* * Sample code block */ #include <iostream> int main() { cerr << "Error message : " << str << endl; return(0); }
-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
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
I will be measuring my success in this class on whether or not i will be able to complete the projects.
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.
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
What happens if i leave the semi colon off of the end of a printf statement
C pocket reference
Based on what i have been reading in the C pocket reference, if i leave a needed semi colon off of a printf statement it will give me a syntax error and not compile.
I am going to take the semi colon off of the Hello, world! program's printf.
When i took the semi colon off of the Hello, World! program and tried to compile it, the following error occurred: hello.c: In function 'main': hello.c:4: error: expected ';' before 'return'
Based on the data collected:
I can conclude that if you have even one syntax error it will not compile your code, but it is very helpful by telling you where it is ( even down to telling you what line in the code it is on)
What will a simple for loop do if i change i++ to i–?
C programming text book
Based on what i have read in the C book i++ increments by 1 every time it loops, my hypothesis is that i– will decrement by 1 every time it loops.
#include<stdio.h> int main() { int i; for (i = 0; i < 10; i--) { printf ("i=%d\n",i); } return 0; }
When i ran this program with i– in the for loop, it did decrement by 1 but it continuously looped, and i had to exit the terminal.
Based on the data collected:
I have concluded that you can increment and decrement in a for loop, just make sure you change the counter statement.
Perform the following steps:
Whose existing experiment are you going to retest? Provide the URL, note the author, and restate their question.
Evaluate their resources and commentary. Answer the following questions:
State their experiment's hypothesis. Answer the following questions:
Follow the steps given to recreate the original experiment. Answer the following questions:
Publish the data you have gained from your performing of the experiment here.
Answer the following:
Answer the following: