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C Program to Find Largest Number Using Dynamic Memory Allocation

This tutorial will teach us how to locate the highest number a user has ever input into a dynamically allocated memory.

C Program:

#include <stdio.h>
#include <stdlib.h>


int main () 
{
  int no;
  double *data_n;
  printf ( "Put the total number of elements: " );
  scanf ( "%d", & no );


  // Memory allocation for required items
  data_n = ( double * ) calloc ( no, sizeof ( double ) );
  if ( data_n == NULL )
  {
  printf ( "Invalid." );
  exit ( 0 );
  }


  // keeping the user's inputted digits.
  for ( int p = 0; p < no; ++ p ) 
  {
  printf ( "Put number %d: ", p + 1 );
  scanf ( "%lf", data_n + p );
  }


  // computing the maximum number
  for ( int p = 1; p < no; ++ p ) 
  {
    if ( *data_n < *( data_n + p ) )
	 {
      *data_n = *( data_n + p );
    }
  }
  printf ( "The largest number is %.2lf", *data_n );


  free ( data_n );


  return 0;
}

Output:

Put the total number of elements: 3
Put number 1: 45
Put number 2: 93
Put number 3: 61
The largest number is 93.00



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