[ITP - Lecture 07] Comments in C/C++

Dec 15, 20170 likes139 views

Comments help explain a program's purpose and operation to readers. There are two styles of comments in C/C++: single-line comments that begin with // and multi-line comments enclosed in /* and */. Comments should provide context around code at a high level and be used liberally to aid future understanding of the program.

C/C++ Comments Intro to Programming
MUHAMMAD HAMMAD WASEEM 1
Comments
Comments are an important part of any program. They help the person writing a program, and
anyone else who must read the source file, understand what’s going on. The compiler ignores comments,
so they do not add to the file size or execution time of the executable program.
Comment Syntax
Let’s rewrite our FIRST program, incorporating comments into our source file. We’ll call the new
program COMMENTS:
// comments.cpp demonstrates comments
#include <stdio.h> //preprocessor directive
int main() //function name “main”
{ //start function body
printf(“Every age has a language of its ownn”); //statement
return 0; //statement
} //end function body
Comments start with a double slash symbol (//) and terminate at the end of the line. (This is one
of the exceptions to the rule that the compiler ignores whitespace.) A comment can start at the beginning
of the line or on the same line following a program statement. Both possibilities are shown in the
COMMENTS example.
When to Use Comments
Comments are almost always a good thing. Most programmers don’t use enough of them. If
you’re tempted to leave out comments, remember that not everyone is as smart as you; they may need
more explanation than you do about what your program is doing. Also, you may not be as smart next
month, when you’ve forgotten key details of your program’s operation, as you are today.
Use comments to explain to the person looking at the listing what you’re trying to do. The details
are in the program statements themselves, so the comments should concentrate on the big picture,
clarifying your reasons for using a certain statement or group of statements.
Alternative Comment Syntax
There’s a second comment style available in C/C++:
/* this is an old-style comment */
This type of comment (the only comment originally available in C) begins with the /* character
pair and ends with */ (not with the end of the line). These symbols are harder to type (since / is lowercase
while * is uppercase) and take up more space on the line, so this style is not generally used in C++.
However, it has advantages in special situations. You can write a multiline comment with only two
comment symbols:
/* this is a potentially very
long Multiline comment */
This is a good approach to making a comment out of a large text passage, since it saves inserting
the // symbol on every line. You can also insert a /* */ comment anywhere within the text of a program
line:
func1() { /* empty function body */ }
If you attempt to use the // style comment in this case, the closing brace won’t be visible to the
compiler—since a // style comment runs to the end of the line—and the code won’t compile correctly.

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Prottutponnomotittwa: A Quiz That Echoed the Pulse of Bengal On the 31st of May, 2025, PRAGYA – The Official Quiz Club of UEM Kolkata – did not merely organize another quiz. It hosted an ode to Bengal — its people, its quirks, its politics, its art, its rebellion, its heritage. Titled Prottutponnomotittwa, the quiz stood as a metaphor for what Bengal truly is: sharp, intuitive, spontaneous, reflective. A cultural cosmos that thrives on instinct, memory, and emotion. From the very first slide, it became clear — this wasn’t a quiz made to showcase difficulty or elitism. It was crafted with love — love for Bangla, for its past, present, and its ever-persistent contradictions. The diversity of the answer list tells the real story of the quiz. The curation was not random. Each answer was a string on a veena of cultural resonance. In the “Cultural Pairings” round, Anusheh Anadil and Arnob were placed not just as musicians, but as voices of a modern, cross-border Bangla. Their works, which blend baul, jazz, and urban folk, show how Bengal exists simultaneously in Dhaka and Shantiniketan. The inclusion of Ritwik Chakraborty and Srijit Mukherjee (as a songwriter) showed how the quiz masters understood evolution. Bangla cinema isn’t frozen in the Ray-Ghatak past. It lives, argues, breaks molds — just like these men do. From Kalyani Black Label to Radhunipagol Chal, consumer culture too had its place. One is liquid courage, the other culinary madness — both deeply Bengali. The heart truly swelled when the answers touched upon Baidyanath Bhattacharya and Chandril. Both satirists, both sharp, both essential. It was not just about naming them — it was about understanding what different types of literature means in a Bengali context. Titumir — the play about a peasant rebel who built his own bamboo fort and dared to challenge the British. Krishnananda Agamvagisha — the mystical Tantric who shaped how we understand esoteric Bengali spiritualism. Subhas Chandra Bose — the eternal enigma, the braveheart whose shadow looms large over Bengal’s political psyche. Probashe Ghorkonna — a story lived by many Bengalis. The medinipur daughter, who made a wholesome family, not only in bengal, but across the borders. This answer wasn’t just information. It was emotion. By the end, what lingered was not the scoreboard. It was a feeling. The feeling of sitting in a room where Chalchitro meets Chabiwala, where Jamai Shosthi shares the stage with Gayatri Spivak, where Bhupen Hazarika sings with Hemanga Biswas, and where Alimuddin Road and Webskitters occupy the same mental map. You don’t just remember questions from this quiz. You remember how it made you feel. You remember smiling at Keet Keet, nodding at Prabuddha Dasgupta, getting goosebumps at the mention of Bose, and tearing up quietly when someone got Radhunipagol Chal right. This wasn’t a quiz. This was an emotional ride of Bangaliyana. This was — and will remain — Prottutponnomotittwa.

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[ITP - Lecture 07] Comments in C/C++

1. C/C++ Comments Intro to Programming MUHAMMAD HAMMAD WASEEM 1 Comments Comments are an important part of any program. They help the person writing a program, and anyone else who must read the source file, understand what’s going on. The compiler ignores comments, so they do not add to the file size or execution time of the executable program. Comment Syntax Let’s rewrite our FIRST program, incorporating comments into our source file. We’ll call the new program COMMENTS: // comments.cpp demonstrates comments #include <stdio.h> //preprocessor directive int main() //function name “main” { //start function body printf(“Every age has a language of its ownn”); //statement return 0; //statement } //end function body Comments start with a double slash symbol (//) and terminate at the end of the line. (This is one of the exceptions to the rule that the compiler ignores whitespace.) A comment can start at the beginning of the line or on the same line following a program statement. Both possibilities are shown in the COMMENTS example. When to Use Comments Comments are almost always a good thing. Most programmers don’t use enough of them. If you’re tempted to leave out comments, remember that not everyone is as smart as you; they may need more explanation than you do about what your program is doing. Also, you may not be as smart next month, when you’ve forgotten key details of your program’s operation, as you are today. Use comments to explain to the person looking at the listing what you’re trying to do. The details are in the program statements themselves, so the comments should concentrate on the big picture, clarifying your reasons for using a certain statement or group of statements. Alternative Comment Syntax There’s a second comment style available in C/C++: /* this is an old-style comment */ This type of comment (the only comment originally available in C) begins with the /* character pair and ends with */ (not with the end of the line). These symbols are harder to type (since / is lowercase while * is uppercase) and take up more space on the line, so this style is not generally used in C++. However, it has advantages in special situations. You can write a multiline comment with only two comment symbols: /* this is a potentially very long Multiline comment */ This is a good approach to making a comment out of a large text passage, since it saves inserting the // symbol on every line. You can also insert a /* */ comment anywhere within the text of a program line: func1() { /* empty function body */ } If you attempt to use the // style comment in this case, the closing brace won’t be visible to the compiler—since a // style comment runs to the end of the line—and the code won’t compile correctly.

[ITP - Lecture 07] Comments in C/C++

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