- 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 Largest Number in an Array
In this article, you will learn and get code to find and print the largest element or number in an array provided by the user (at run-time) in C++. Here is the list of programs:
- Without using a function, find the largest number in an array
- Using a user-defined function, find the largest number in an array
In C++, find the largest element in an array without using a function
To find the largest element in an array in C++ programming, you have to ask the user to enter the size of the array and then enter elements of that size. Then find and print the largest number or element from the given list, as shown in the program given below.
The question is, "Write a program in C++ to find and print the largest number in an array." Here is its answer:
#include<iostream> using namespace std; int main() { int arr[100], tot, larg, i; cout<<"Enter the Size (max. 100): "; cin>>tot; cout<<"Enter "<<tot<<" Array Elements: "; for(i=0; i<tot; i++) cin>>arr[i]; larg = arr[0]; for(i=1; i<tot; i++) { if(larg<arr[i]) larg = arr[i]; } cout<<"\nLargest Number = "<<larg; cout<<endl; return 0; }
This program was built and runs under the Code::Blocks IDE. Here is its sample run:
Now enter the array's size, say 6.And then enter any six numbers or elements. After supplying all the inputs, press the ENTER key to find and print the largest number from the given list of numbers, as shown in the snapshot given below:
The statement:
larg = arr[0];
states that it is assumed that the largest element is present at the very first index (that is, 0th) of the array. Or it is supposed that the largest element is the first element of the array. We compared the value of larg with each and every value present at rest indexes. While comparing, if the value of larg is found to be less, then the new value (which is greater than larg's value) gets initialized to it (the larg variable).
The dry run of the above program with user input 6 as size and 1, 2, 3, 6, 5, 4 as 6 array elements goes like this:
- Because the array size is entered as 6. So tot=6
- And when the user enters six array elements, then it gets stored in arr[], in this way:
- arr[0]=1
- arr[1]=2
- arr[2]=3
- arr[3]=6
- arr[4]=5
- arr[5]=4
- The value at the 0th index, 1 is now initialized to larg. So larg=1
- The execution of the for loop starts. That is, its initialization part gets executed first and only once. So i=1
- With i=1, the condition i<tot or 1<6 evaluates to be true, therefore program flow goes inside the loop.
- Inside the loop, the condition larg<arr[i] or 1<arr[1] or 1<2 evaluates to be true, therefore program flow goes inside the if's body and the value of arr[i] gets initialized to larg. So larg=2
- Now the program flow goes to the update part of the for loop and increments the value of i and evaluates the condition again.
- That is, i=2 and the condition i<tot or 2<6 again evaluates to be true, therefore, program flow again goes inside the loop.
- This process continues until the condition is evaluated as false.
- After exiting the loop, the variable larg holds the largest element from the given array.
- As a result, print the value of larg.
Using a C++ Function, find the largest element in an array
Let's create the same-purpose program using a user-defined function, findLarge(). This function takes two arguments. The first argument is the array, and the second is its size. The largest element gets returned by this function.
#include<iostream> using namespace std; int findLarge(int [], int); int main() { int arr[100], tot, larg, i; cout<<"Enter the Size (max. 100): "; cin>>tot; cout<<"Enter "<<tot<<" Array Elements: "; for(i=0; i<tot; i++) cin>>arr[i]; larg = findLarge(arr, tot); cout<<"\nLargest Number = "<<larg; cout<<endl; return 0; } int findLarge(int a[], int s) { int i, m; m = a[0]; for(i=1; i<s; i++) { if(m<a[i]) m = a[i]; } return m; }
This program produces the same output as the previous program.
The same program in different languages
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