w3resource

C Exercises: Allocate a block of memory for an array

C Variable Type : Exercise-11 with Solution

Write a C program to allocate a block of memory for an array.

Sample Solution:

C Code:

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

int main ()
	{
		int i,n,num;
		int * my_array;
       printf("\nInput the number of elements to be stored in the array :");
       scanf("%d",&n);
   
       printf("Input %d elements in the array :\n",n);
		my_array = (int*) calloc ( n,sizeof(int) );
		if (my_array==NULL)
		{
			printf (" Requested memory allocation is wrong.");
			exit (1);
		}
		for ( i=0; i<n; i++ )
		{
			printf (" element %d : ",i+1);
			scanf ("%d",&my_array[i]);
		}
		printf (" Values entered in the array are : \n");
		for ( i=0; i<n; i++ )
			printf (" %d ",my_array[i]);
			printf ("\n\n");
		free (my_array);
		return 0;
	}

Sample Output:

Input the number of elements to be stored in the array :5                                                     
Input 5 elements in the array :                                                                               
 element 1 : 5                                                                                                
 element 2 : 10                                                                                               
 element 3 : 15                                                                                               
 element 4 : 20                                                                                               
 element 5 : 25                                                                                               
 Values entered in the array are :                                                                            
 5  10  15  20  25

Flowchart:

C Exercises Flowchart: Allocate a block of memory for an array

C Programming Code Editor:

Improve this sample solution and post your code through Disqus

Previous: Write a C program to find the quotient and remainder of a division.
Next: Write a C program to perform a binary search in an array.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



C Programming: Tips of the Day

How I can print to stderr in C?

The syntax is almost the same as printf. With printf you give the string format and its contents i.e.:

printf("my %s has %d chars\n", "string format", 30);

With fprintf it is the same, except now you are also specifying the place to print to:

File *myFile;
...
fprintf( myFile, "my %s has %d chars\n", "string format", 30);

Or in your case:

fprintf( stderr, "my %s has %d chars\n", "string format", 30);

Ref : https://bit.ly/3v5U8Zq