- C++ Programming Examples
- C++ Programming Examples
- C++: Hello World
- C++: Get Input
- C++: Print Integer
- C++: Add two numbers
- C++: Add, Sub, Multiply, Div
- C++: Add Digits
- C++: Find Average and Percentage
- C++: Find Arithmetic Mean
- C++: Sum of n Natural Numbers
- C++: Sum of n Numbers
- C++: Square's Area and Perimeter
- C++: Rectangle's Area and Perimeter
- C++: Triangle's Area and Perimeter
- C++: Area and Circumference
- C++: Find Simple Interest
- C++: Fahrenheit to Celsius
- C++: Celsius to Fahrenheit
- C++: Print Prime Numbers
- C++: Reverse a Number
- C++: Swap Two Numbers
- C++: Print Multiplication Table
- C++: Find Factorial of a Number
- C++: Find Factors of a Number
- C++: Find HCF and LCM
- C++: Create a Calculator
- C++: Count Digits in a Number
- C++: First and Last Digit Sum
- C++: Product of Number Digits
- C++: Sum of Squares of Digits
- C++: Interchange Digits of Number
- C++ if-else Programs
- C++: Check Even or Odd
- C++: Check Prime or Not
- C++: Check Alphabet or Not
- C++: Check Vowel or Not
- C++: Check Leap Year or Not
- C++: Check Reverse equals Original
- C++: Check Perfect Number
- C++: Check Palindrome or Not
- C++: Check Armstrong or Not
- C++: Divisibility Test
- C++: Find Labor Wage
- C++: Find Discounted Price
- C++: Find Shipping Charge
- C++: Find Telephone Bills
- C++: Calculate Student Grade
- C++: Largest of Two Numbers
- C++: Largest of Three Numbers
- C++ Number Conversion
- C++: Decimal to Binary
- C++: Decimal to Octal
- C++: Decimal to Hexadecimal
- C++: Binary to Decimal
- C++: Binary to Octal
- C++: Binary to Hexadecimal
- C++: Octal to Decimal
- C++: Octal to Binary
- C++: Octal to Hexadecimal
- C++: Hexadecimal to Decimal
- C++: Hexadecimal to Binary
- C++: Hexadecimal to Octal
- C++ Pattern Programs
- C++: Pattern Programs
- C++: Print Diamond Pattern
- C++: Print Floyd's Triangle
- C++: Print Pascal's Triangle
- C++ Array Programs
- C++: 1D Array Program
- C++: Linear Search
- C++: Binary Search
- C++: Largest Element in an Array
- C++: Smallest Element in an Array
- C++: Find Second Largest Element
- C++: Find Second Smallest Element
- C++: Sum of All Elements
- C++: Multiply All Elements
- C++: Element in Even Position
- C++: Element in Odd Position
- C++: Print Even Numbers in Array
- C++: Print Odd Numbers in Array
- C++: Count Even or Odd Numbers
- C++: Sum of Even or Odd Numbers
- C++: Count Positive, Negative, Zero
- C++: Reverse an Array
- C++: Insert an Element
- C++: Delete an Element
- C++: Merge two Arrays
- C++: Bubble Sort
- C++: Selection Sort
- C++: Insertion Sort
- C++: Common Elements
- C++: 2D Array Programs
- C++: Add Two Matrices
- C++: Subtract Two Matrices
- C++: Transpose Matrix
- C++: Multiply Two Matrices
- C++: 3D Array Programs
- C++ String Programs
- C++: Print String
- C++: Find String Length
- C++: Compare Two Strings
- C++: Copy String
- C++: String Concatenation
- C++: Reverse a String
- C++: Delete Vowels from a String
- C++: Delete a Word from a String
- C++: Count Characters in a String
- C++: Count Words in a String
- C++: Frequency of Words
- C++: Remove Spaces from Strings
- C++: Sort a String
- C++: Uppercase to Lowercase
- C++: Lowercase to Uppercase
- C++: Swap Two Strings
- C++: Check the Anagram or Not
- C++: Capitalize All Words in a String
- C++: Get Numbers from a String
- C++ File Programs
- C++: Read a File
- C++: Write Content to a File
- C++: Append Data to a File
- C++: Read and Display File
- C++: Copy a File
- C++: Merge Two Files
- Count Characters in a File
- C++: Capitalize Every Word
- C++: List Files in Directory
- C++: Delete a File
- C++: Encrypt and Decrypt a File
- C++ Misc Programs
- C++: Print ASCII Value
- C++: Add Binary Numbers
- C++: Generate Random Numbers
- C++: Print a Smiling Face
- C++: Days into Years and Months
- C++: Add Two Numbers using Pointer
- C++: Print Fibonacci Series
- C++: Generate Armstrong Numbers
- C++: Find nCr and nPr
- C++: Get IP Address
- C++: Print Date and Time
- C++: Shutdown and Restart Computer
- C++ Programming Tutorial
- C++ Tutorial
C++ Program to Find the Second Largest Element in an Array
This article provides programs in C++ to find and print the second largest element of an array entered by the user. The program is created using both for and while loops.
Following is a list of programs available in this article:
- Find the second largest element using the for loop.
- Find the second largest element using the while loop.
Find the second largest element using the for loop
The question is, "Write a C++ program to find and print the second largest element in a given array." The program given below is its answer:
#include<iostream> using namespace std; int main() { int i, arr[10], large, slarge; cout<<"Enter 10 Array Elements: "; for(i=0; i<10; i++) cin>>arr[i]; large = arr[0]; for(i=0; i<10; i++) { if(large<arr[i]) large = arr[i]; } slarge = arr[0]; for(i=0; i<10; i++) { if(slarge<arr[i]) { if(arr[i]!=large) slarge = arr[i]; } } cout<<"\nSecond Largest Element = "<<slarge; cout<<endl; return 0; }
The snapshot given below shows the initial output produced by the above C++ program on finding and printing the second largest element from the given array:
Now supply the input, say 1, 10, 2, 9, 3, 8, 4, 7, 5, and 6 as ten elements, and press the ENTER key to find and print the second largest element from the given array, as shown in the snapshot given below:
In the above program,
- I've assumed the very first element is the largest one.
- That is, the first element at the 0th index gets initialized to large.
- Now, using the value "large," I've checked with each and every element of the array.
- While checking, if the value of large is found to be less than any element, then I've initialized that element as the new value of large.
- In this way, the largest element gets stored in large.
- Now again, I've supposed that the very first element is the second-largest element. That is, "slarge" has the highest value this time.
- Now again, I've done the same job of comparing the value of slarge with each and every element of the array.
- But this time, if the value in slarge is found to be lesser, then the element gets initialized as the new value of slarge only when the element is not equal to large.
- In this way, the second-largest element gets found out and stored in slarge variable.
- Therefore, after exiting from the loop, just print the value of slarge as the second largest element of the array.
Now the question is, what if the user doesn't want to enter 10 elements?
That is, what if the user wants to
enter some n elements, and based on those n elements, he/she wants to find the second largest element?
So we've got to modify the program.
Therefore, let's modify the above program and create another program that allows the user to define the size of the array along with its elements of a given size, as shown in the following program:
#include<iostream> using namespace std; int main() { int tot, i, arr[100], large, slarge; cout<<"Enter the Size of Array: "; cin>>tot; cout<<"Enter "<<tot<<" Array Elements: "; for(i=0; i<tot; i++) cin>>arr[i]; large = arr[0]; for(i=0; i<tot; i++) { if(large<arr[i]) large = arr[i]; } slarge = arr[0]; for(i=0; i<tot; i++) { if(slarge<arr[i]) { if(arr[i]!=large) slarge = arr[i]; } } cout<<"\nSecond Largest Element = "<<slarge; cout<<endl; return 0; }
Here is its sample run with user input of 5 as size and 1, 5, 2, 4, 4 as five elements:
Find the second largest element using the while loop
Except for the approach, this program is nearly identical to the previous one. This program is created using the while loop. The rest of the things are exactly the same as in the previous program.
#include<iostream> using namespace std; int main() { int tot, i=0, arr[10], large, slarge; cout<<"Enter the Size of Array: "; cin>>tot; cout<<"Enter "<<tot<<" Array Elements: "; while(i<tot) { cin>>arr[i]; i++; } large = arr[0]; i=0; while(i<tot) { if(large<arr[i]) large = arr[i]; i++; } slarge = arr[0]; i=0; while(i<tot) { if(slarge<arr[i]) { if(arr[i]!=large) slarge = arr[i]; } i++; } cout<<"\nSecond Largest Element = "<<slarge; cout<<endl; return 0; }
This program does exactly the same job as the previous program.
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