C program to find maximum element in array

This code find maximum or largest element present in an array. It also prints the location or index at which maximum element occurs in array. This can also be done by using pointers (see both codes).

C programming code

#include <stdio.h>

int main()

{

  int array[100], maximum, size, c, location = 1;

  printf("Enter the number of elements in array\n");

  scanf("%d", &size);

  printf("Enter %d integers\n", size);

  for (c = 0; c < size; c++)

    scanf("%d", &array[c]);

  maximum = array[0];

  for (c = 1; c < size; c++)

  {

    if (array[c] > maximum)

    {

       maximum  = array[c];

       location = c+1;

    }

  }

  printf("Maximum element is present at location %d and it's value is %d.\n", location, maximum);

  return 0;

}

Output of program:

Enter the number of elements in array

3

Enter 3 integers

10

20

30

Maximum element is present at location 3 and it's value is 30

C programming code using pointers

#include <stdio.h>

int main()

{

  long array[100], *maximum, size, c, location = 1;

  printf("Enter the number of elements in array\n");

  scanf("%ld", &size);

  printf("Enter %ld integers\n", size);

  for ( c = 0 ; c < size ; c++ )

    scanf("%ld", &array[c]);

  maximum  = array;

  *maximum = *array;

  for (c = 1; c < size; c++)

  {

    if (*(array+c) > *maximum)

    {

       *maximum = *(array+c);

       location = c+1;

    }

  }

  printf("Maximum element found at location %ld and it's value is %ld.\n", location, *maximum);

  return 0;

}

The complexity of above code is O(n) as the time used depends on the size of input array or in other words time to find maximum increases linearly as array size grows.

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