Main.cpp

permutation

Main.cpp

STDIN

Output:

Main.cpp: In function ‘int main()’:
Main.cpp:9:7: error: ‘i’ was not declared in this scope
    9 |   for(i=0;i<n;i++)
      |       ^
Main.cpp:11:11: error: ‘v’ was not declared in this scope
   11 |     cout<<v<<" ";
      |           ^
Main.cpp:16:14: error: ‘v’ was not declared in this scope
   16 |    for(int i:v)
      |              ^
Main.cpp:22:27: error: ‘v’ was not declared in this scope
   22 |   while( next_permutation(v.begin(),v.end()));
      |                           ^

created 1 year ago

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About C++

C++ is a widely used middle-level programming language.

Supports different platforms like Windows, various Linux flavours, MacOS etc
C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
Case-sensitive
C++ is a compiler based language
C++ supports structured programming language
C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

3. For:

For loop is used to iterate a set of statements based on a condition.

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

permutation

C++ Online Compiler

Read inputs from stdin

About C++

Syntax help

Loops

1. If-Else:

2. Switch:

3. For:

4. While:

5. Do-While:

Functions

How to declare a Function:

How to call a Function:

How to define a Function:

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