In this we discussed about how to find the reverse of an array with some approaches and you can also do with more approaches
the below points mentions we discussed in this article
- Question
- sample input
- Logic
- solution with loop
- solution using function
- video explanation
Question-
wap in C++ to Reverse an Array
sample input
enter the range - 4
2 4 6 3
After reversing the elements are
3 6 4 2
Logic to solve
- Take an array of some integers then take a variable ( n ) for taking the input how many data the user want to enter then run a for loop to taking the inputs .
- Again run another for loop but this time make the condition till n/2 because we want to swap this time like from last value to first and the process continue till the half so we take n/2.
- Take a temp variable and swap the values .
- Then again run a for loop to displaying the array after reversing.
 |
| C++ Program to reverse an array |
solve using for loop
Source Code
#include<iostream>
using namespace std;
int main()
{
int arr[10],n;
//to taking the inputs for array
cout<<"Enter the range of array :"<<endl;
cin>>n;
for (int i = 0; i < n; i++)
{
cout<<"Enter the data no. "<<i+1<<" :";
cin>>arr[i];
}
//to reverse the array
for (int i = 0; i < n/2; i++)
{
int temp;
temp=arr[i];
arr[i]=arr[n-1-i]; //arr[n-1-i] is for swapping from last to reverse
arr[n-1-i]=temp;
}
//to show the array
cout<<"After reversing the array :\n";
for (int i = 0; i < n; i++)
{
cout<<arr[i]<<" ";
}
return 0;
}
VIDEO EXPLANATIONS
solve using functions
source code
#include<iostream>
using namespace std;
//This function is to reverse the array
void reversearr(int arr[],int n) //function definitions
{
for (int i = 0; i < n/2; i++)
{
int temp;
temp=arr[i];
arr[i]=arr[n-1-i]; //arr[n-1-i] is for swapping from last to reverse
arr[n-1-i]=temp;
}
}
//this function is to display the array
void display(int arr[],int n)
{
cout<<"After reversing the array :\n";
for (int i = 0; i < n; i++)
{
cout<<arr[i]<<" ";
}
}
int main()
{
int arr[10],n;
//to taking the inputs for array
cout<<"Enter the range of array :"<<endl;
cin>>n;
for (int i = 0; i < n; i++)
{
cout<<"Enter the data no. "<<i+1<<" :";
cin>>arr[i];
}
reversearr(arr,n); //function call
display(arr,n);
return 0;
}
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