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Articles by Bhanu Priya
Page 104 of 106
Explain scope rules related to the functions in C language
Scope rules are related to the following factors −Accessibility of a variables.Period of existence of a variable.Boundary of usage of variables.Scope rules related to functions are as followsFunction which is a self-contained block that performs a particular task.Variables that are declared within the function body are called local variables.These variables only exist inside the specific function that creates them. They are unknown to other functions and to the main functions too.The existence of local variables ends when the function completes its specific task and returns to the calling point.Example 1Following is the C program for scope rules related to functions ...
Read MoreWhat are the predefined functions in C language?
Functions are broadly classified into two types, which are as follows −Predefined functionsUser defined functionsPredefined (or) library functionsThese functions are already defined in the system libraries.Programmer will reuse the already present code in the system libraries to write error free code.But to use the library functions, user must be aware of syntax of the function.Example −sqrt() function is available in math.h library and its usage is −y= sqrt (x) x number must be positive eg: y = sqrt (25) then ‘y’ = 5printf ( ) present in stdio.h library.clrscr ( ) present in conio.h library.ExampleGiven below is the C program ...
Read MoreWhat are different pointer operations and problems with pointers in C language?
A pointer is a variable whose value is the address of an another variable, i.e., direct address of the memory location. Like any variable or constant, you must declare a pointer before using it to store any variable address.Consider the following statement −int qty = 179;The representation of the variable in memory is as follows −You can declare a pointer as follows −Int *p;It means ‘p’ is a pointer variable that holds the address of another integer variable.Address operator (&) is used to initialize a pointer variable.For Example −int qty = 175; int *p; p= &qty;To access the value of ...
Read MoreExplain monolithic and modular programming in C language
The difference between monolithic programming and modular programming along with the advantages and disadvantage are explained below in detail.Monolithic programmingIf, we write an entire program in a single function that is in main function then, you call it as a monolithic type of programming. But, it is not a good style of writing entire logic in a single function.DisadvantagesThe disadvantages of monolithic programming include −Program seems to be very large and complex.Debugging, testing and maintenance of a program is very difficult.Modular ProgrammingIf the program is divided into number of functional parts, then we use to call it as modular programming.If ...
Read MoreHow communication among functions is established in C language?
Functions communicate among themselves with the help of arguments and return value.Farm of ‘C’ function is as follows −return-datatype function name (argument list){ local variable declarations; executable statements(s); return (expression); }For example, void mul (int x, int y){ int p; p=x*y; printf("product = %d”, p); }Return values and their typesA function may or may not send back a value to the calling function.It will be done by using the return statementThe return types are void, int, float, char and double.If a function is not returning any value, then its return type is ‘void’.Function nameA ...
Read MoreExplain top-down design and structure chart of function in C language
A function is a self-contained block that carries out a specific well defined task.Advantages of functions in C language include −Reusability.The length of the program can be reduced.It is easy to locate and find any faulty function.It facilitates top-down modular programming.Top down design and structure chartsIt is a problem solving method in which a complex problem is solved by splitting into sub problems.Structure chart is a documentation tool that shows the relationships among the sub problems of a problem.The splitting of a problem into its related sub problems is the process of refining an algorithm. For example, performing arithmetic operations ...
Read MoreHow to print the range of numbers using C language?
ProblemFor given number try to find the range in which that number exists.SolutionHere, we are learning how to find the ranges of a number.The logic that we apply to find range is −lower= (n/10) * 10; /*the arithmetic operators work from left to right*/ upper = lower+10;ExplanationLet number n=45Lower=(42/10)*10 // division returns quotient =4*10 =40Upper=40+10=50Range − lower-upper − 40-50ExampleFollowing is the C program for printing the range of numbers −#include main(){ int n, lower, upper; printf("Enter a number:"); scanf("%d", &n); lower= (n/10) * 10; /*the arithmetic operators work from left to right*/ upper ...
Read MoreWhat are the different computer languages?
The programming languages are used to give instructions to the computer in a language which a computer can understand.Computer languages are classified into three types as follows −Machine languagesSymbolic languagesHigh level languagesMachine languagesComputer is a machine. Since, its memory can store only 1’s and 0’s, instructions must be given to the computer in streams of 1’s and 0’s i.e. binary code.These are easily understandable by the machine.Programs written in binary code can be directly entered into computer for execution and it is known as machine language.Advantages of machine language include −Execution is very fast.It is very difficult to write and ...
Read MoreExplain the Format of C language
C programming is a general-purpose, procedural, imperative computer programming language. In C language, we see thatStatements are terminated with semicolons.C is case sensitiveIndentation is ignored by the compiler.Strings are placed in double quotes.Library functions are lowercase.Newlines are handled via Format of CThe format of C programming language is explained below −SemicolonsSemicolons are very important in C.It tells the compiler, where one statement ends and the next statement begins.If we fail to place the semicolon after each statement, you will get compilation errors.Case SensitivityC is a case sensitive language. Although, int compiles, "Int”, "INT” or any other variation will not be ...
Read MoreCheck if the value entered is palindrome or not using C language
A palindrome is nothing but any word, number, sentence, or other sequence of characters that reads the same backward as forward.In this programming, we are trying to enter a number from console, and assign that number to temp variable.If number is greater than zero, apply the logic given below −while(n>0){ r=n%10; sum=(sum*10)+r; n=n/10; }If temp=sum, then the given number is a palindrome. Otherwise, it is not a palindrome.ExampleFollowing is the C program for verification of a value being palindrome −#include #include void main(){ int n, r, sum=0, temp; printf("Enter a number: "); scanf("%d", &n); ...
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