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Variables declaration in C++

Creating a variable reserves a memory location, or a space in memory for storing values. The compiler requires that you provide a data type for each variable you

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Comments line in C++

Comments are explanatory statements that you can include in C++ code to explain what the code is doing. The compiler ignores everything that appears in the comment,so

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How to break a output line in C++

The cout operator does not insert a line break at the end of the output. One way to print two lines is to use the endl manipulator, which

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Introduction to C++

C++ is a statically typed,general purpose programming language. C++ was derived C, band is largely based on it. Note: A programming language is said to used static

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Difference between C and Ansi C

Main difference: C was originally developed by Dennis Ritchie at AT&T Bell Labs between 1969 and 1973. It has a free-format program source code. C

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What does the C ??!??! operator do?

??! is a trigraph that translates to |. So it says: if(a || b){ ... }else{ ... } So, what is digraphs and trigraphs? In computer programming, digraphs and trigraphs are sequences of

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Why in C language is it the case that a[5] == 5[a]?

The C standard defines the Array Subscript Operator [] as follows: a[b] == *(a + b) Therefore a[5] will evaluate to: *(a + 5) and 5[a] will evaluate to:

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Why isn't sizeof for a struct equal to the sum of sizeof of each member?

This is because of padding added to satisfy alignment constraints. Data structure alignment impacts both performance and correctness of programs. Here's an example using typical settings

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Why is one loop so much slower than two loops?

Suppose a1, b1, c1, and d1 point to heap memory and code has the following loop. const int n=100000; for(int j=0;j<n;j+

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Why is processing a sorted array faster than an unsorted array?

Here is a piece of Visual C++ code that seems very peculiar. For some strange reason, sorting the data miraculously makes the code almost six times faster. #include

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What is the difference between #include <filename> and #include “filename”?

The difference is in the location where the preprocessor searches for the included file. For #include "filename" the preprocessor searches in the same directory as the

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What are the differences between a pointer variable and a reference variable?

* A pointer can be re-assigned: int x = 5; int y = 6; int *p; p = &x; p = &y; *p = 10; assert(x == 5); assert(y == 10)

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What is the name of the "-->" operator?

Here's an example: #include <stdio.h> int main() { int x = 10; while( x --> 0 ) // x goes to 0 { printf("%d ", x)

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Quiz - Loops (for, while, do while, break, continue and goto) in C Programming

This quiz is based on this Loops in C tutorial including introduction to for loop, while loop, do while loop, break, continue statement, and goto. So, To get

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Turbo C++ IDE Shortcuts

S.No. Shortcuts keys Action 1 F1 For Help 2. F2 Save 3. F3 Open 4. F4 Go to cursor 5. F5 Zoom 6. F6 Next 7. F7