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Pointer is the most important and powerful tool in C language. Pointer resolves many complicated problems easily but if you don’t have the sufficient knowledge of pointers, you will face problems like segmentation fault etc.
In this article, I will describe five common pointer mistakes in C programming which generally occurs.
Bitwise operators are used to manipulate data at its lowest level (bit level). Data in memory (RAM) is organized as a sequence of bytes. Each byte is a group of eight consecutive bits. We use bitwise operators whenever we need to manipulate bits directly. In this post I will show you some cool bitwise operator hacks and tricks. These hacks will boost your programming skill.
Infinite loop is a looping construct that iterates forever. In programming life either intentionally or unintentionally, you come across an infinite loop. Generally a program in an infinite loop either produces continuous output or does nothing. Infinite loops are also known as indefinite or endless loop.
As a novice programmer, you must know how to debug an infinite loop. As an intermediate programmer you must know how and when to use infinite loop. Let us first learn when to use infinite loop and how to define.
switch...case both programming constructs has ability to take decision based on conditions. Both are almost similar in nature. However, there is always a debate among beginners which to use and when to use what?
In this post, I will compare both on various grounds. So let us begin.
In the series of learning programming, we learned about data types. Data type is a system for defining various properties of data stored in memory. Properties such as, type of data, range of data, bytes occupied etc.
Data type in C programming is categorized three categories.
- Primitive data type
- Derived data type
- User defined type
Read more - List of all format specifiers in C
In C programming data types play a major role, so is their size and range. The
sizeof() operator gives you bytes required to store value of some type in memory. However, in programming you must be aware of range of a type to avoid overflow and underflow errors.
The size of a data type is compiler dependent and so is its range. So, you must not hardcode size and range values in your program.
There are two ways to find minimum and maximum range of a type. You can use any of the approach to get range of a type.
Size of a data type is machine dependent and vary from compiler to compiler. However, in programming there exists situations when we need to know total bytes a type occupies in memory. To find exact size of a type in C programming we use
sizeof() is a special operator used to find exact size of a type in memory. The
sizeof() operator returns an integer i.e. total bytes needed in memory to represent the type or value or expression.
sizeof() is much used operator by programmers. It is very useful for developing portable programs.
main() is a special function in C programming language. Reasons that make it special are -
- It defines starting point of the program.
mainis the first executed function.
- It controls all other child functions.
- Behaves as both user-defined and pre-defined function.
- Every software written in C must have a main function.
C is a popular programming language. There exist many compilers and standards for C. So exists many variants of
main function declaration. In this post we will learn various declarations of
main one by one. Later we will see the standard definition of the
main function in C.