Java Questions

Java Questions

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Working with C++ Pointers

In todays C++ video we are working with C++ pointers! Have questions? Leave them below!

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Working with C++ Pointers

Remove the limitation of only returning one value in C/C++

Pointers are identical to a variable but stores the address of another variable. The pointer’s data type will be the same as the data type of the variable. The call by reference methodarguments to a function copies the address of an argument into the formal parameter. A variable stores the value and pointer stores the address of a variable. You can visually see the difference in the example given below. A compiler must do these three things for a variable:

  • Reserve space in memory to hold the integer value
  • Associate the name i with this memory location.
  • Store the value 3 at this location.

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A function is a self-contained block of statements that performs a coherent task of some kind. A function prototype is a declaration of a function that specifies the function’s name and type signature (arity, data types of parameters, and return type), but discards the function body.

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#pointers-in-c #pointers #c #c-programming #c++ #cplusplus

Tamale  Moses

Tamale Moses

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How to Run C/C++ in Sublime Text?

C and C++ are the most powerful programming language in the world. Most of the super fast and complex libraries and algorithms are written in C or C++. Most powerful Kernel programs are also written in C. So, there is no way to skip it.

In programming competitions, most programmers prefer to write code in C or C++. Tourist is considered the worlds top programming contestant of all ages who write code in C++.

During programming competitions, programmers prefer to use a lightweight editor to focus on coding and algorithm designing. VimSublime Text, and Notepad++ are the most common editors for us. Apart from the competition, many software developers and professionals love to use Sublime Text just because of its flexibility.

I have discussed the steps we need to complete in this blog post before running a C/C++ code in Sublime Text. We will take the inputs from an input file and print outputs to an output file without using freopen file related functions in C/C++.

#cpp #c #c-programming #sublimetext #c++ #c/c++

Dicey Issues in C/C++

If you are familiar with C/C++then you must have come across some unusual things and if you haven’t, then you are about to. The below codes are checked twice before adding, so feel free to share this article with your friends. The following displays some of the issues:

  1. Using multiple variables in the print function
  2. Comparing Signed integer with unsigned integer
  3. Putting a semicolon at the end of the loop statement
  4. C preprocessor doesn’t need a semicolon
  5. Size of the string matters
  6. Macros and equations aren’t good friends
  7. Never compare Floating data type with double data type
  8. Arrays have a boundary
  9. Character constants are different from string literals
  10. Difference between single(=) and double(==) equal signs.

The below code generates no error since a print function can take any number of inputs but creates a mismatch with the variables. The print function is used to display characters, strings, integers, float, octal, and hexadecimal values onto the output screen. The format specifier is used to display the value of a variable.

  1. %d indicates Integer Format Specifier
  2. %f indicates Float Format Specifier
  3. %c indicates Character Format Specifier
  4. %s indicates String Format Specifier
  5. %u indicates Unsigned Integer Format Specifier
  6. %ld indicates Long Int Format Specifier

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A signed integer is a 32-bit datum that encodes an integer in the range [-2147483648 to 2147483647]. An unsigned integer is a 32-bit datum that encodes a non-negative integer in the range [0 to 4294967295]. The signed integer is represented in twos-complement notation. In the below code the signed integer will be converted to the maximum unsigned integer then compared with the unsigned integer.

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#problems-with-c #dicey-issues-in-c #c-programming #c++ #c #cplusplus

Hudson  Larkin

Hudson Larkin

1600203840

C++ Pointer Example | Pointers in C/C++

C++ pointer is a variable whose value is the address of another variable. Pointers are a symbolic representation of addresses. They enable programs to simulate call-by-reference as well as to create and manipulate dynamic data structures. You must declare the pointer before you can work with it.

C++ Pointer Example

If we want to understand the pointer, let’s review the “regular” variables first. If you’re familiar with the programming language without pointers like JavaScript, this is what you think when you hear “variable”.

When declaring a variable by an identifier (or name), the variable is synonymous with its value.

int number = 3;
std::cout << "number is initialized with a value of " << number << "\n";
// Outputs: number is initialized with a value of 3

The value of a variable can be modified directly.

#regular #c++ #pointers in c/c++

Sadie  Ratke

Sadie Ratke

1590252600

How to work with static variables in C

Inside a function, you can initialize a static variable using the static keyword.

I said “inside a function”, because global variables are static by default, so there’s no need to 
add the keyword.

What’s a static variable? A static variable is initialized to 0 if no initial value is specified, and it retains the value across function calls.

#c #c# #c++ #programming-c