Essentials of C Program
Let's delve deeper into our introductory program:
Main.c
12345678#include <stdio.h> // preprocessor directive int main() // the main function { printf("Hello, c<>definity!\n"); // print text return 0; // exit }
printf Function
The printf()
function displays output on the screen. For our example, it shows the message "Hello, c<>definity!"
. Text meant for display should be wrapped in double quotes, like this:
printf("some text");
Control Characters
Note
In C,
\n
is recognized as a single character, not two separate characters ("\"
and"n"
).
The character sequence \n
represents a newline. This means that any content following this sequence will appear on the next line.
Main.c
12345678#include <stdio.h> int main() { printf("Hel\nlo"); return 0; }
Throughout this course, we'll occasionally utilize the \t
character for tabulation, which equates to a tab, or 4 spaces.
Main.c
12345678#include <stdio.h> int main() { printf("Hel\tlo"); return 0; }
The Semicolon
The semicolon ;
signifies the end of a statement in C. Every statement in C should conclude with a ;
. Think of it like the period at the end of a written sentence.
The Return Statement
return
is the statement used to end a function and potentially return a value. In the context of the main
function, the standard in C requires the use of return 0
. While it has specific implications on UNIX systems, it generally indicates an "Exit status" or the successful termination of a program. We'll explore the return
statement in greater depth as the course progresses.
Danke für Ihr Feedback!
Fragen Sie AI
Fragen Sie AI
Fragen Sie alles oder probieren Sie eine der vorgeschlagenen Fragen, um unser Gespräch zu beginnen
Awesome!
Completion rate improved to 2.63
Essentials of C Program
Swipe um das Menü anzuzeigen
Let's delve deeper into our introductory program:
Main.c
12345678#include <stdio.h> // preprocessor directive int main() // the main function { printf("Hello, c<>definity!\n"); // print text return 0; // exit }
printf Function
The printf()
function displays output on the screen. For our example, it shows the message "Hello, c<>definity!"
. Text meant for display should be wrapped in double quotes, like this:
printf("some text");
Control Characters
Note
In C,
\n
is recognized as a single character, not two separate characters ("\"
and"n"
).
The character sequence \n
represents a newline. This means that any content following this sequence will appear on the next line.
Main.c
12345678#include <stdio.h> int main() { printf("Hel\nlo"); return 0; }
Throughout this course, we'll occasionally utilize the \t
character for tabulation, which equates to a tab, or 4 spaces.
Main.c
12345678#include <stdio.h> int main() { printf("Hel\tlo"); return 0; }
The Semicolon
The semicolon ;
signifies the end of a statement in C. Every statement in C should conclude with a ;
. Think of it like the period at the end of a written sentence.
The Return Statement
return
is the statement used to end a function and potentially return a value. In the context of the main
function, the standard in C requires the use of return 0
. While it has specific implications on UNIX systems, it generally indicates an "Exit status" or the successful termination of a program. We'll explore the return
statement in greater depth as the course progresses.
Danke für Ihr Feedback!