﻿ C exercises: Allocate a block of memory for an array - 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
```

C Programming Code Editor:

```#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;
}```

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