write a C program to print the second largest number in the array. In this C programming example, we are going to find the second largest number of an array
What is an array?
The array is just a list of similar datatype
for example a=[14,15,86,5,89,52] here all the elements are integer which denotes its an array
Algorithm to find second largest number in array
- Include libraries and initializing main method and variables we needed
- Take input from the user and creating an array
- Performing logic to find the second largest element from the array
- Print the output got from the logic
C program to find second largest number in array
#include<stdio.h>
#include<limits.h>
void main(){
int i,size,first,second;
printf("please enter the number of element you want:");
scanf("%d",&size);
int arr[size];
printf("enter elements :");
for(i=0;i<size;i++){
scanf("%d",&arr[i]);
}
first=second=INT_MIN;
for(i=0;i<size;i++){
if(arr[i]>first){
second=first;
first=arr[i];
}
else if (arr[i]>second&&arr[i]<first){
second=arr[i];
}
}
printf("the second largest element is %d",second);
}
Explanation of the Code
On-Line no:1 include standard input and output library
On-Line no:2 include a standard limit library for taking the useful methods and function
On-Line no:3 creating the main method with void as its datatype
On-Line no:4 initialize the required variables
On-Line no:5 taking input from the user how much size the array should have
On-Line no:6 using scanf to take input
On-Line no:7 now here we initialize the array with the size that the user has given
On-Line no:8 giving the command to start printing the element
On-Line no:9 using for loop to append that element in the array
On-Line no:10 using scanf method to append the values in the array
On-Line no:11 closing the scope of the for loop
On-Line no:12 as we import limit library we took the minimum values that can a variable hold and dump it into two variables named first and second
On-Line no:13 now running for loop to access each and every element one by one
On-Line no:14 checking the element is greater than the first one
On-Line no:15 if yes then swapped that value to the variable second
On-Line no:16 now the accessed variable will be in the variable first
On-Line no:17 closing the if conditions scope
On-Line no:18 now else if part begins and checks the accessed element if it is greater then second variable and the smaller then first variable
On-Line no:19 now dumping that element into the variable named second
On-Line no:20 closing scope of else if the condition
On-Line no:21 closing scope of for loop
On-Line no:22 printing the output value which is our second largest element in the array
On-Line no:23 closing scope of the main method
Output
In this blog, we learned that how to create a program to find the second largest element in the array
