C Program to Find the Largest Element in an Array
Example: Display the Largest Element of an array
#include <stdio.h>
int main()
{
int i, n;
float arr[100];
printf("Enter total number of elements(1 to 100): ");
scanf("%d", &n);
printf("\n");
// Stores number entered by the user
for(i = 0; i < n; ++i)
{
printf("Enter Number %d: ", i+1);
scanf("%f", &arr[i]);
}
// Loop to store largest number to arr[0]
for(i = 1; i < n; ++i)
{
// Change < to > if you want to find the smallest element
if(arr[0] < arr[i])
arr[0] = arr[i];
}
printf("Largest element = %.2f", arr[0]);
return 0;
}Output
Enter total number of elements(1 to 100): 8 Enter Number 1: 23.4 Enter Number 2: -34.5 Enter Number 3: 50 Enter Number 4: 33.5 Enter Number 5: 55.5 Enter Number 6: 43.7 Enter Number 7: 5.7 Enter Number 8: -66.5
This program takes n number of elements from the user and stores it in array arr[].
To find the largest element, the first two elements of the array are checked and the largest of these two-element is placed in arr[0].
Then, the first and third elements are checked and the largest of these two elements is placed in arr[0].
This process continues until and first and last elements are checked.
Finally, the largest element of an array will be in arr[0] position.
The above program works fine, however, it alters the original array as well. The program below computes the largest element of an array without modifying the original array.
#include <stdio.h>
int main()
{
int i, n;
float arr[100], temp;
printf("Enter total number of elements(1 to 100): ");
scanf("%d", &n);
printf("\n");
// Stores number entered by the user
for(i = 0; i < n; ++i)
{
printf("Enter Number %d: ", i+1);
scanf("%f", &arr[i]);
}
// Loop to store largest number to arr[0]
for(i = 1; i < n; ++i)
{
// Change < to > if you want to find the smallest element
if(arr[0] < arr[i])
{
temp = arr[0];
arr[0] = arr[i];
arr[i] = temp;
}
}
printf("Largest element = %.2f", arr[0]);
return 0;
}C program to find the largest element in an array:
#include <stdio.h>
#define MAX_SIZE 100
int main()
{
int arr[MAX_SIZE];
int i, n, max;
// Input array size
printf("Enter the size of the array (max %d): ", MAX_SIZE);
scanf("%d", &n);
// Input array elements
printf("Enter %d elements in the array:\n", n);
for (i = 0; i < n; i++) {
scanf("%d", &arr[i]);
}
// Find largest element
max = arr[0];
for (i = 1; i < n; i++) {
if (arr[i] > max) {
max = arr[i];
}
}
// Output result
printf("Largest element in the array is: %d\n", max);
return 0;
}
This program first defines an integer array arr of size MAX_SIZE, where MAX_SIZE is a constant integer. It then prompts the user to input the size of the array and its elements, and finds the largest element by iterating through the array and keeping track of the maximum value encountered. Finally, it outputs the largest element.
Note that the program assumes that the array size is less than or equal to MAX_SIZE. If the user inputs a size larger than MAX_SIZE, the program will not work correctly.