Find the second largest element in an array ?

 #include<stdio.h>  
 #include<conio.h>  
 int main()  
 {  
  int a[50],size,i,j=0,b,s;  
  printf("Enter the size of the array: ");  
  scanf("%d",&size);  
  printf("Enter %d Elements in to the array: ", size);  
  for(i=0;i<size;i++)  
   scanf("%d",&a[i]);  
  b=a[0];  
  for(i=1;i<size;i++)  
 {  
    if(b<a[i])  
 {  
       b=a[i];  
       j = i;  
    }  
  }  
  s=a[size-j-1];  
  for(i=1;i<size;i++)  
 {  
    if(s <a[i] && j != i)  
      s =a[i];  
  }  
  printf("Second biggest: %d", s);  
  return 0;  
 }  
 output:  
 Enter the size of the array: 5  
 Enter 5 Elements in to the array: 5 3 2 1 0  
 Second biggest: 3