Table of Contents
Part 1
Entries
Entry 1: Feb 21, 2012
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.
- learning the syntax of C
- you cant write proper code without knowing the syntax of a language.
Entry 2: Feb 22, 2012
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.
- first time understand the “if” and “while” statements.
- loops are a very important part of programming.
Entry 3: Feb 23, 2012
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.
- using the sum function
- i have not used any math functions up to this time.
Entry 4: Feb 28, 2012
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.
- ciphering a message
- understand how chars work(they are numbers)
- getting the cipher to not display non alphabetic symbols.
Keywords
cprog Keywords
(standard I/O)
Standard I/O
Definition
Standard In and Standard Out. Standard In is usually the key board, standard out is usually the monitor.
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:
/* * Sample code block */ #include <stdio.h> int main() { printf("dafsf"); scanf("fda"); return(0); }
(Header files)
Header files
Definition
are files that are include in the main file, that have data in another file.
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:
/* * Sample code block */ #include <stdio.h>
(pointers)
pointers
Definition
pointers are used to refer to a memory location of another variable, with out using that variable identifier.
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:
/* * Sample code block */ #include <stdio.h> int *chicken int main() { return(0); }
(variables)
variables
Definition
variables are place holders for a values that are in memory.
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:
/* * Sample code block */ #include <stdio.h> int chicken char turkey int main()
(scope)
scope
Definition
place in the declaration where a variables name can be used
(array)
array
Definition
a way of organizing a collection of related data, using a variable name
(type casting)
type casting
Definition
making a one type of variable act like another type of variable for a single operation.
(arithmetic)
arithmetic
Definition
(+)(-)(*)(/)(%)
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:
/* * 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$
cprog Objective
cprog Objective
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
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 1
Question
What would happen if i left the \n off of a printf statement?
Resources
According to resources on wikipedia, \n is used to space lines when a program is being run.
Hypothesis
I think that if i leave the \n off of a printf, that the result will look cluttered and will join lines together.
Experiment
I am going to test this experiment by writing a simple “hello world” program and leave the \n off of it
Data
When i take the \n off of “Hello World!\n” the command prompt is jammed right after Hello World!
Analysis
Based on the data collected:
- Was your hypothesis correct? yes my hypothesis is correct
Conclusions
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.
Experiment 2
Question
What will happen if i remove the return(0); from a simple Hello, world program?
Resources
According to people on wikipedia, unless you declare something to be void, then you have to return something.
Hypothesis
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.
Experiment
I am going to erase the return(0); from the Hello World program and attempt to compile it.
Data
When i erase the return(0); from the program and compile it, it does not seg fault, it compiles fine, and runs fine.
Analysis
Based on the data collected:
- Was your hypothesis correct? No, my hypothesis was not correct
Conclusions
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?)
Experiment 3
Question
What would happen if i erased the header file <stdio.h> from the Hello World program
Resources
I have been reading on Wikipedia, that stdio.h includes the input and output functions for c programming.
Hypothesis
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.
Experiment
To test this Experiment i am going to remove the stdio.h header file and compile the remainder of the code.
Data
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.
Analysis
Based on the data collected:
- Was your hypothesis correct? My hypothesis was for the most part correct
Conclusions
I have concluded that depending on what functions you want to use in your programming you need to include the proper header files.