Use thegetcharFunction to Read String Input in C This article will demonstrate multiple methods about how to use thegetcharfunction in C. Thegetcharfunction is part of standard input/output utilities included in the C library. There are multiple functions for character input/output operations like...
Use thegetnameinfoFunction to IP Address to Host Name in C Thegetnameinfofunction is used in conjunction withgetaddrinfoin this case, and it retrieves the hostnames for corresponding IP addresses. Notice that we process the user input from the first command-line argument and pass it as theget...
In this article, we are going to discuss how to use the mmap() function in Linux. So, let’s get started. Header File: #include <sys/mman.h> Syntax: void * mmap (void *address, size_t length, int protect, int flags, int filedes, off_t offset) Arguments: The function takes ...
The isalpha function in C programming checks whether the argument passed is an alphabetic character (a to z and A-Z) or not.
C program to understand the working of toupper function: Consider the below code where I am passing different characters in the toupper function. You can see the output of this function with different characters. #include <stdio.h> #include <ctype.h> ...
If we are unable to use the assert() function, we must be disabled, so ndebug should be defined. It was decided to declare it using #define NDEBUG code; otherwise, the code compilation should pass. -NDEBUG in the code. The code compilation will pass -DNDEBUG to disable the assert() fu...
Let’s now look at some examples, to understand this function better. We’ll also be usingfork()along withexecvp(), so that we can still have our C program with us! Using execvp() in C / C++ - Some Examples If you want to see what exactly happens if you try to useexecvp()withou...
extern "C" { void f(); } void func(void) { std::cout<<"\n being used within C++ code\n"; } int main(void) { f(); func(); return 0; } The C function f() is declared within the notation extern “C” to tell the cpp compiler that it has C type linkage. ...
Example 9 – Using the PRODUCT Function to Multiply Two or More Outputs of the VLOOKUP Function We can use the PRODUCT function along with the VLOOKUP Function. Steps: In cell E5, enter the following formula: =PRODUCT(VLOOKUP(H5,$B$5:$C$12,2,0), VLOOKUP(H5,$E$5:$F$12,2,0)) ...
This article discusses thefread()function in C programming language and the way to use it in the program. fread() Function in C Language Thefread()function requires three arguments: the pointer to an array, the size of each element from the array pointer, and the number of elements to rea...