C program to find largest and second largest elements in array

In this tutorial, we will discuss the concept of C program to find largest and second largest elements in Array.

In this topic, we will learn how to find the largest and second largest elements of array elements in C programming language

This program gets “n” number of elements and Enter the elements of the array as input from the user. then, this program finds and displays the largest and second largest elements from the array using for loop and if statements.

C program to largest and second largest element in array — largest and second largest element in array

In this programs, we can see step by step procedure for completion of the program.

Essential variable declaration
array declaration
Get input from the user for array length
Get input from the user for array elements
loop for find the largest and second largest value
Display result on the screen

Find largest and second largest elements from integer Array

Program 1

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int size,i,arr[50];//variable declaration for size of array
int large=0, secondLarge=0;

printf("Enter the number of elements in array: ");
scanf("%d",&size);//taking input from user for number of elements in array

for(i=0; i<size; i++){
    printf("Enter the array element ");
    printf("%d :",(i+1));
scanf("%d",&arr[i]);//Taking input for array elements

if(large<arr[i]){
secondLarge=large;
large=arr[i];
}
else if(secondLarge<arr[i]){
secondLarge=arr[i];
}
}
printf("\n%d is the largest nunber\n",large);
printf("%d is te second largest nunber",secondLarge);
//display result on the screen
getch();
    return 0;
}

When the above code is executed, it produces the following results

Enter the number of elements in array: 6
Enter the array element 1: 67
Enter the array element 1: 89
Enter the array element 1: 78
Enter the array element 1: 54
Enter the array element 1: 23
Enter the array element 1: 42

89 is the largest number
78 is the second largest number

Find largest and second largest elements from float Array

Program 2

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int size,i;
    float arr[50];//variable declaration for size of array
float large=0.0, secondLarge=0.0;//declare and initialize large and second large number

printf("Enter the number of element in te array: ");
scanf("%d",&size);//taking input from user for no of elements in array

for(i=0; i<size; i++){
    printf("Enter the array element ");
    printf("%d: ",(i+1));
scanf("%f",&arr[i]);//taking input fron user to array elements

if(large<arr[i]){
secondLarge=large;
large=arr[i];
}
else if(secondLarge<arr[i]){
secondLarge=arr[i];
}
}
printf("\n%.2f is the largest nunber\n",large);
printf("%.2f is the second largest nunber",secondLarge);
//display result on the screen
getch();
    return 0;
}

When the above code is executed, it produces the following results

Enter the number of elements in the array: 6
Enter the array element 1: 45.3
Enter the array element 2: 89.67
Enter the array element 1: 12.45
Enter the array element 1: 76.32
Enter the array element 1: 45.67
Enter the array element 1: 65.32

89.67 is the largest number
76.32 is the second largest number

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