How to iterate over the words of a string in C++?
In this post, we’ll learn how to iterate through a string word by word in C++. How to iterate through a string word by word in C++? Use this to …
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Articles related to C and C++ programming languages.
explicit keyword in C++
Short explanation: Suppose, you have a class String: Now, if you try: The character ‘x’ will be implicitly converted to int and then the String(int) constructor will be called. But, this is not what the user might …
Learn MoreWhat is the “–>” operator in C/C++? [Answered]
Query: Here’s the code: Output: I’d assume this is C, since it works in GCC as well. Where is this defined in the standard, and where has it come from? …
Learn MoreHow to use extern to share variables between source files in C? [Answered]
Query explanation: I know that global variables in C sometimes have the extern keyword. What is an extern variable? What is the declaration like? What is its scope? This is related to sharing variables …
Learn MoreHow to remove trailing newline character from fgets() input? [Answered]
Sample problem: I am trying to get some data from the user and send it to another function in gcc. The code is something like this. However, I find that …
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Query explained: First off, here is some code: Is there a way to find out the size of the array that ptr is pointing to (instead of just giving its size, which …
Learn MoreWhat are the differences between a pointer variable and a reference variable in C++?
Query: I know references are syntactic sugar, so code is easier to read and write. But what is the difference between a pointer variable and a reference variable? What are …
Learn MoreWhy is it faster to process a sorted array than processing an unsorted array? [Answered]
Query explained: Here is a piece of C++ code that shows some very peculiar behavior. For some strange reason, sorting the data (before the timed region) miraculously makes the loop almost …
Learn MoreHow to resolve build errors due to circular dependency amongst classes? [Answered]
Sample problem: I often find myself in a situation where I am facing multiple compilation/linker errors in a C++ project due to some bad design decisions (made by someone else …
Learn MoreWhat is the copy-and-swap idiom? [Answered]
Query: What is the copy-and-swap idiom and when should it be used? Which problems does it solve? Does the idiom change when C++11 is used? The copy-and-swap idiom- Answer #1: …
Learn MoreHow to iterate over the words of a string in C++? [Answered]
I’m trying to iterate over the words of a string. The string can be assumed to be composed of words separated by whitespace. Note that I’m not interested in C …
Learn Morescanf() leaves the new line char in the buffer | C [Answered]
Sample problem: I have the following program: As I read in the C book, the author says that scanf() left a new line character in the buffer, therefore, the program does not …
Learn MoreHow to profile C++ code running on Linux? [Answered]
Query: I have a C++ application, running on Linux, which I’m in the process of optimizing. How can I pinpoint which areas of my code are running slowly? How to …
Learn MoreWhat are the rules about using an underscore in a C++ identifier? [Answered]
Query: It’s common in C++ to name member variables with some kind of prefix to denote the fact that they’re member variables, rather than local variables or parameters. If you’ve …
Learn MoreWhat is Object Slicing in C++? [Answered]
Object slicing in C++: Answer #1: “Slicing” is where you assign an object of a derived class to an instance of a base class, thereby losing part of the information …
Learn MoreWhere and why do I have to put the “template” and “typename” keywords? [Answered]
Problem: In templates, where and why do I have to put typename and template on dependent names?What exactly are dependent names anyway? I have the following code: The problem I have is in the typedef …
Learn MoreCan a local variable’s memory be accessed outside its scope? | C++ [Answered]
Problem: I have the following code. And the code is just running with no runtime exceptions! The output was 58 How can it be? Isn’t the memory of a local variable …
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