Finding the Second Largest Element

Level: Medium

You are given a sequence of integers as input, terminated by a -1. (That is, the input integers may be positive, negative or 0. A -1 in the input signals the end of the input.)

-1 is not considered as part of the input. 

Find the second largest number in the input. You may not use arrays.

program---


#include<stdio.h>

int main()
{
int n,a,b,tmp;
scanf("%d",&n);

a=n;
scanf("%d",&n);
if(n!=-1)
b=n;


if(a<b)
{tmp=a;a=b;b=tmp;}

scanf("%d",&n);
while(n!=-1)
{
if(a>n)
   {
       if(b<n)
       b=n;
       
   }
   else 
   {b=a;a=n;}
   scanf("%d",&n);   
  }   
       
printf("%d",b);
return 0;

}