Overview Flashcards
What is ANSI
American National Standards Institute
Who created C?
Dennis Ritchie at Bell Labs 1972 to design UNIX operating system.
What are the steps in the Program Development Cycle?
Use an editor to create a disk file containing source code. Compile source code into an object file. Link compiled code to create an executable file. Run and check the code to see if it performs as planned.
What is source code?
A series of statements or commands that instruct the computer to perform a task.
The code programmers create and edit.
Where is source code developed?
An editor like NotePad that works in ASCII.
What is ASCII?
American Standard Code for Information Interchange.
What is the file extension for C and for Objective-C?
.c for C
.m for Objective-C
What does compiling do?
A compiler translates source code to binary machine language called object code. The compiler produces a disk file called an object file.
What is the command to compile C source code in the Gnu Step Shell compiler?
gcc filename.c -o filename
What is the file called and what is its name extension once it is compiled?
A compiled file is an object file with a .obj extension such as filename.obj filename.o for UNIX.
What step follows compiling?
Linking
What does linking do?
Linking is the last step in making a program ready to run. It creates executable code. Linking connects the compiled object code to a predefined function library of compiled object code. Linking is often automatically done at the compiling stage.
What is a library function?
A library function is ANSI C compiled code that performs frequently needed tasks like displaying information on a screen or reading data from disk files.
How do I run an executable file?
Enter the filename at the system prompt.
What is the final step in C programming?
Run the program and check the results. If they are different than expected, identify what caused the problem, correct it in source code, recompile source code into object code and then relink object code to create a new executable file.
What is the file extension of a compiled and linked file?
The file extension of a compiled and linked file is .exe as in filename.exe
What is the basic format of a C program source code program?
#include
int main(void)
{
printf("Hello, World!\n");
return 0;
}What is the path on the PC in Gnu Step Shell to the program files?
cd /c/users/Conrad/desktop/programs
What is the code to run a file in Gnu Step Shell?
./filename.exe
Describe the main function.
Required in every executable C program.
main (void)
What is an #include directive?
The #include directive instructs the C compiler to add the contents of an include file into a program during compilation.
What is an #include file?
An #include file is a disk file that can be used by a program or the compiler. Header files are supplied with the compiler.
What is the variable directive?
A name assigned to a memory location used to store a certain type of information.
What is a function prototype?
A function prototype provides the C compiler with the name and arguments of a program’s function.
How do you insert comments?
for any length between markers: /* comment */
for single line // comment
Don’t nest comments
What are the parameters for program statements?
One per line (generally)
End with semicolon
Form
printf(“text\n”);
scanf(“%d”, &val1);
printf(“text %d\n”, val1);
