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C Articles
Page 59 of 96
Program to convert given number of days in terms of Years, Weeks and Days in C
You are given with number of days, and the task is to convert the given number of days in terms of years, weeks and days.Let us assume the number of days in a year =365Number of year = (number of days) / 365Explanation-: number of years will be the quotient obtained by dividing the given number of days with 365Number of weeks = (number of days % 365) / 7Explanation-: number of weeks will be obtained by collecting the remainder from dividing the number of days with 365 and further dividing the result with number of days in a week ...
Read MoreImplicit Threading and Language-based threads
Implicit ThreadingOne way to address the difficulties and better support the design of multithreaded applications is to transfer the creation and management of threading from application developers to compilers and run-time libraries. This, termed implicit threading, is a popular trend today.Implicit threading is mainly the use of libraries or other language support to hide the management of threads. The most common implicit threading library is OpenMP, in context of C.OpenMP is a set of compiler directives as well as an API for programs written in C, C++, or FORTRAN that provides support for parallel programming in shared-memory environments. OpenMP identifies ...
Read MoreWindows thread API in the C program
Threads are created in the Windows API using the CreateThread() function, and—just as in Pthreads—a set of attributes like security information, the size of the stack, and a flag for the thread is passed to this function. In the below program, we use the default values for these attributes. (The default values do not initially set the thread to a suspended state and instead make it eligible to be run by the CPU scheduler.) Once the summation thread is created, the parent must wait for it to complete before outputting the value of Sum, as the value is set by ...
Read MoreArc function in C
In the C programming language, there is an option to create an arc of a circle of a given radius with a given center coordinates and degree of the arc.The arc() function is used to create an arc. This arc function is included in graphics.h library in C which contains methods that can draw figures on the output screen.Syntaxvoid arc(int x, int y, int startangle, int endangle, int radius);Now, let's get deep into the function and understand each parameter passed and output returned by the function.Parametersx − type = int, function: defines the x coordinate of the center of the arc.y ...
Read MoreGrand Central Dispatch (GCD)
Grand Central Dispatch (GCD) - a technology for Apple’s Mac OS X and iOS operating systems-is a combination of extensions to the C language, an API, and a run-time library that allows application developers to identify sections of code to run in parallel. Like OpenMP, GCD manages most of the details of threading. GCD identifies extensions to the C and C++ languages known as blocks. A block is simply a self-contained unit of work. It is specified by a caret ˆ inserted in front of a pair of braces { }. A simple example of a block is shown below ...
Read MoreWhat is OpenMP?
OpenMP is a set of compiler directives as well as an API for programs written in C, C++, or FORTRAN that provides support for parallel programming in shared-memory environments. OpenMP identifies parallel regions as blocks of code that may run in parallel. Application developers insert compiler directives into their code at parallel regions, and these directives instruct the OpenMP run-time library to execute the region in parallel. The following C program illustrates a compiler directive above the parallel region containing the printf() statement −#include #include int main(int argc, char *argv[]){ /* sequential code */ #pragma omp ...
Read MoreWindows Anonymous Pipe
Windows anonymous pipes are actually Ordinary pipes, and they behave similarly to their UNIX counterparts: they are unidirectional and employ parent-child relationships between the communicating processes. In addition, reading and writing to the pipe can be accomplished with the ordinary ReadFile() and WriteFile() functions. The Windows API use CreatePipe() function for creating pipes, which is passed four parameters. The parameters provide separate handles forreading andwriting to the pipeAn instance of the STARTUPINFO structure, used to specify that the child process is to inherit the handles of the pipe.the size (in Bytes) of the pipe may be specified.Windows requires the programmer ...
Read MoreC/C++ Function Call Puzzle?
This C/C++ function call puzzle is a puzzle that is intended to explore more about the behaviour of method calling in both the programming languages C and C++/.The output of a method in C and C++ is different. Lets see what is the difference in calling methods in C and C++.Let’s take an example and check the output of the below code in c and c++.Example Live Demovoid method() { // Print statement } int main() { method(); method(2); }OutputFor C++ −Error : too many arguments to function ‘void method()’For C −Program runs without any error.Logic behind the ...
Read MoreC program to check if a given string is Keyword or not?
Keyword is a predefined or reserved word which is available in C++ library with a fixed meaning and used to perform an internal operation. C++ Language supports more than 64 keywords.Every Keyword exists in lower case letters like auto, break, case, const, continue, int etc.32 Keywords in C++ Language which is also available in the C language.autodoubleintstructbreakelselongswitchcaseenumregistertypedefcharexternreturnunionconstfloatshortunsignedcontinueforsignedvoiddefaultgotosizeofvolatiledoifstaticwhileThese are 30 reserved words that were not in C, but added to C++asmdynamic_castnamespacereinterpret_castboolexplicitnewstatic_castcatchfalseoperatortemplateclassfriendprivatethisconst_castinlinepublicthrowdeletemutableprotectedtruetrytypeidtypenameusingusingusingwchar_tInput: str=”for” Output: for is a keywordExplanationKeywords are reserved words which cannot be used as variable names in program.There are 32 keywords in the C programming language.Compare the string with each ...
Read MoreSum of the series 1.2.3 + 2.3.+ … + n(n+1)(n+2) in C
Find the sum up to n terms of the series: 1.2.3 + 2.3.4 + … + n(n+1)(n+2). In this 1.2.3 represent the first term and 2.3.4 represent the second term.Let’s see an example to understand the concept better, Input: n = 5 Output: 420Explanation1.2.3 + 2.3.4 + 3.4.5 + 4.5.6 + 5.6.7 = 6 + 24 + 60 + 120 + 210 = 420nth term = n(n+1)(n+2); where n = 1, 2, 3, …= n(n^2+3n+2)=n^3 +3n^2 +2nNow, noteSum =n(n+1)/2 ; if nth term =n=n(n+1)(2n+1)/6 ; if nth term =n^2=n^2(n+1)^2/4 ; if nth term =n^3Hence the required sum =n^2(n+1)^2 /4 + ...
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