Let's see the example of malloc() function.
#include<stdio.h>
#include<stdlib.h>
int main(){
int n,i,*ptr,sum=0;
printf("Enter number of elements: ");
scanf("%d",&n);
ptr=(int*)malloc(n*sizeof(int)); //memory allocated using malloc
if(ptr==NULL)
{
printf("Sorry! unable to allocate memory");
exit(0);
}
printf("Enter elements of array: ");
for(i=0;i<n;++i)
{
scanf("%d",ptr+i);
sum+=*(ptr+i);
}
printf("Sum=%d",sum);
free(ptr);
return 0;
}
Output:
Enter elements of array: 3
Enter elements of array: 10
10
10
Sum=30
Let's see the example of calloc() function.
#include<stdio.h>
#include<stdlib.h>
int main(){
int n,i,*ptr,sum=0;
printf("Enter number of elements: ");
scanf("%d",&n);
ptr=(int*)calloc(n,sizeof(int)); //memory allocated using calloc
if(ptr==NULL)
{
printf("Sorry! unable to allocate memory");
exit(0);
}
printf("Enter elements of array: ");
for(i=0;i<n;++i)
{
scanf("%d",ptr+i);
sum+=*(ptr+i);
}
printf("Sum=%d",sum);
free(ptr);
return 0;
}
Output:
Enter elements of array: 3
Enter elements of array: 10
10
10
Sum=30
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