Can two or more operators such as and be combined in a single line of program code?

C Programming Language > Overview of C Language > Basic Structure of C Programming

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1976

Answer:

Yes, it

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436. Why is it that not all header files are declared in every C program?

Answer: The choice of declaring a header file at the top of each C program would depend on what commands/functions you will be using in that program. Since each header file contains different function definitions and prototype, you would be using only those header files that would contain the functions you will need. Declaring all header files in every program would only increase the overall file size and load of the program, and is not considered a good programming style.

# Tutorial: Basic Structure of C Programming

Question: Overview of C Language Short

437. When is the "void" keyword used in a function?

Answer: When declaring functions, you will decide whether that function would be returning a value or not. If that function will not return a value, such as when the purpose of a function is to display some outputs on the screen, then "void" is to be placed at the leftmost part of the function header. When a return value is expected after the function execution, the data type of the return value is placed instead of "void".

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438. What are compound statements?

Answer: Compound statements are made up of two or more program statements that are executed together. This usually occurs while handling conditions wherein a series of statements are executed when a TRUE or FALSE is evaluated. Compound statements can also be executed within a loop. Curly brackets { } are placed before and after compound statements.

# Tutorial: Basic Structure of C Programming

Question: Overview of C Language Short

439. What is the significance of an algorithm to C programming?

Answer: Before a program can be written, an algorithm has to be created first. An algorithm provides a step by step procedure on how a solution can be derived. It also acts as a blueprint on how a program will start and end, including what process and computations are involved.

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440. What is the advantage of an array over individual variables?

Answer: When storing multiple related data, it is a good idea to use arrays. This is because arrays are named using only 1 word followed by an element number. For example: to store the 10 test results of 1 student, one can use 10 different variable names (grade1, grade2, grade3

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441. Write a loop statement that will show the following output:112123123412345

Answer:

 
for (a=1; a<=5; i++) {
for (b=1; b<=a; b++)
printf("%d",b);
printf("");
}

# Tutorial: for Loop in C

Question: Loop control in C Language Short

442. What is wrong in this statement? scanf("%d",whatnumber);

Answer: An ampersand & symbol must be placed before the variable name whatnumber. Placing & means whatever integer value is entered by the user is stored at the "address" of the variable name. This is a common mistake for programmers, often leading to logical errors.

# Tutorial: Basic Structure of C Programming

Question: Overview of C Language Short

443. How do you generate random numbers in C?

Answer: Random numbers are generated in C using the rand() command. For example: anyNum = rand() will generate any integer number beginning from 0, assuming that anyNum is a variable of type integer.

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Question: Function in C Language Short

444. What could possibly be the problem if a valid function name such as tolower() is being reported by the C compiler as undefined?

Answer: The most probable reason behind this error is that the header file for that function was not indicated at the top of the program. Header files contain the definition and prototype for functions and commands used in a C program. In the case of "tolower()", the code "#include " must be present at the beginning of the program.

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445. What are comments and how do you insert it in a C program?

Answer: Comments are a great way to put some remarks or description in a program. It can serves as a reminder on what the program is all about, or a description on why a certain code or function was placed there in the first place. Comments begin with /* and ended by */ characters. Comments can be a single line, or can even span several lines. It can be placed anywhere in the program.

# Tutorial: Basic Structure of C Programming

Question: Overview of C Language Short

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