Example programs to solve the problems of Arrays in C.
Write a C program to read in four integer numbers into an array and find the average of largest two of the given numbers without sorting the array. The program should output the given four numbers and the average with suitable headings. Read more about C Programming Language .

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#include <stdio.h>
#include <conio.h>
#define MAX 4

void main()
{
 int a[MAX], i, l1,l2,temp;

 clrscr();

 printf("Enter %d integer numbersn", MAX);
 for (i=0; i < MAX; i++)
 {
  scanf("%d", &a[i]);
 }

 printf("Input interger aren");
 for (i=0; i < MAX; i++)
 {
  printf("%5d", a[i]);
 }

 printf("n");

 l1 = a[0];  /*assume first element of array is the first largest*/
 l2 = a[1];  /*assume first element of array is the second largest*/

 if (l1 < l2)
 {
  temp = l1;
  l1 = l2;
  l2 = temp;
 }

 for (i=2;i<4;i++)
 {
  if (a[i] >= l1)
  {
   l2 = l1;
   l1 = a[i];
  }
  else if(a[i] > l2)
  {
   l2= a[i];
  }
 }

 printf("n%d is the first largestn", l1);
 printf("%d is the second largestn", l2);
 printf("nAverage of %d and %d = %dn", l1,l2, (l1+l2)/2);

}

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