Skip to main content

Merging One Dimensional Arrays

Merging of two arrays means to form one big array from two small arrays, which has element from both the arrays linearly.

Ex. if we have the following two arrays:

array1 [5] = {1,2,3,4,5}

array2 [5] = {6,7,8,9,10}

and we merge these two arrays to form an array merge_array, then it would have these elements:

merge_array [5] ={1,2,3,4,5,6,7,8,9,10}

So, from this example we understand that the array which will hold the merged elements should have a dimension equal to the sum of the dimensions of the two discrete arrays.

It is no big deal to merge two arrays, we just need to sum up the dimension of the arrays, and then allocate an array having that dimension.

Below is the example program that illustrates this.

Please go through the program to understand every bit of it. It is accompanied with enough comments to make everything clear. While two arrays has been merged here, you can easily modify it to merge as many arrays as you wish.

  // -- Array Merging --
  // -- Program --
  // -------------------
  // Example program to illustrate
  // the merging of arrays
  // process.h is needed for
  // the exit function

  void main(void)
   int i,j;

   // declare pointers for the needed
   // arrays
   int *array1,*array2;
   int *merge_array;

   // variables for the sizes of the arrays
   // given by the user
   int size_array1,size_array2,size_array3;

   // input the number of elements
   // required, by the user
   cout<<"enter no. of elements for array1:";
   cout<<"enter no. of elements for array2:";

   // calculate the no. of elements
   // required for the merge_array

   // allocate the required arrays
   array1=new int[size_array1];
   array2=new int[size_array2];
   merge_array=new int[size_array3];

   // terminate if there is a problem in
   // memory allocation of the arrays
   if(array1==NULL || array2==NULL || merge_array==NULL)

   // input the array elements
   cout<<"\nFirst Array:\n";
    cout<<"element "<<i+1<<":";

   cout<<"\nSecond Array:\n";
    cout<<"element "<<i+1<<":";

   // merging is being done here
   // till here

    cout<<"element "<<i+1<<":";


   // free-up the memory
   delete[] array1;
   delete[] array2;
   delete[] merge_array;


Related Articles:

Popular posts from this blog

Fix For Toshiba Satellite "RTC Battery is Low" Error (with Pictures)

RTC Battery is Low Error on a Toshiba Satellite laptop "RTC Battery is Low..." An error message flashing while you try to boot your laptop is enough to panic many people. But worry not! "RTC Battery" stands for Real-Time Clock battery which almost all laptops and PCs have on their motherboard to power the clock and sometimes to also keep the CMOS settings from getting erased while the system is switched off.  It is not uncommon for these batteries to last for years before requiring a replacement as the clock consumes very less power. And contrary to what some people tell you - they are not rechargeable or getting charged while your computer or laptop is running. In this article, we'll learn everything about RTC batteries and how to fix the error on your Toshiba Satellite laptop. What is an RTC Battery? RTC or CMOS batteries are small coin-shaped lithium batteries with a 3-volts output. Most laptops use

The Best Way(s) to Comment out PHP/HTML Code

PHP supports various styles of comments. Please check the following example: <?php // Single line comment code (); # Single line Comment code2 (); /* Multi Line comment code(); The code inside doesn't run */ // /* This doesn NOT start a multi-line comment block /* Multi line comment block The following line still ends the multi-line comment block //*/ The " # " comment style, though, is rarely used. Do note, in the example, that anything (even a multi-block comment /* ) after a " // " or " # " is a comment, and /* */ around any single-line comment overrides it. This information will come in handy when we learn about some neat tricks next. Comment out PHP Code Blocks Check the following code <?php //* Toggle line if ( 1 ) {      // } else {      // } //*/ //* Toggle line if ( 2 ) {      // } else {      // } //*/ Now see how easy it is to toggle a part of PHP code by just removing or adding a single " / " from th

Introduction to Operator Overloading in C++

a1 = a2 + a3; The above operation is valid, as you know if a1, a2 and a3 are instances of in-built Data Types . But what if those are, say objects of a Class ; is the operation valid? Yes, it is, if you overload the ‘+’ Operator in the class, to which a1, a2 and a3 belong. Operator overloading is used to give special meaning to the commonly used operators (such as +, -, * etc.) with respect to a class. By overloading operators, we can control or define how an operator should operate on data with respect to a class. Operators are overloaded in C++ by creating operator functions either as a member or a s a Friend Function of a class. Since creating member operator functions are easier, we’ll be using that method in this article. As I said operator functions are declared using the following general form: ret-type operator#(arg-list); and then defining it as a normal member function. Here, ret-type is commonly the name of the class itself as the ope