#include<stdio.h>
#include<malloc.h>


void sort(int srr[], int iSize)
{
	for (int pass = 1;pass < iSize;pass++)
	{
		for (int i = 0;i < iSize - pass;i++)
		{
			if (srr[i] > srr[i + 1])
			{
				int temp = srr[i];
				srr[i] = srr[i + 1];
				srr[i + 1] = temp;
			}
		}
	}
}


void Lsum(int orr[], int iSize, int iRsum)
{
	int i = 0, j = 0, iTsum = 0;

	int* arr = NULL;
	arr = (int*)malloc(iSize * sizeof(int));

	for (i = 0;i < iSize;i++)
	{
		arr[i] = orr[i];
	}

	sort(arr, iSize);


	for (i = 0; i < iSize; i++)
	{
		iTsum = arr[i];
		for (j = i;j < iSize;j++)
		{
			if (i != j)
			{
				iTsum = iTsum + arr[j];
			}
			if (iTsum == iRsum)
			{
				printf("Elements are::  ");
				for (int k = i;k <= j;k++)
				{
					printf("%d ",arr[k]);
				}
				printf("\n\n");
				return;
			}
		}
	}
	printf("......Sorry the elements are not found......\n\n");
}


int main()
{
	int iSize = 0, iSum=0;
	while (1)
	{

		printf("Enter the number of elements::\n");
		scanf("%d", &iSize);

		int* p = NULL;

		p = (int*)malloc(iSize * sizeof(int));

		printf("Enter the elements::\n");
		for (int i = 0; i < iSize; i++)
		{
			scanf("%d", &p[i]);
		}

		printf("Enter the required sum::\n");
		scanf("%d", &iSum);

		Lsum(p, iSize, iSum);
	}
	return 0;
}

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

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.

if(conditional-expression) {
   //code
}
else {
   //code
}

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.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

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

for(Initialization; Condition; Increment/decrement){  
  //code  
}

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.

while (condition) {  
// code 
}

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.

do {  
 // code 
} while (condition);

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.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}