free dynamic memory allocation

 #include <stdio.h>

#include <stdlib.h>

int main(){

//printf("The size of int in your computer is %d\n",sizeof(int));

// printf("The size of float in your computer is %d\n",sizeof(float));

// printf("The size of char in your computer is %d\n",sizeof(char));

int * ptr;

int * ptr2;

int n;

printf("Enter the size of array:\n");

scanf("%d",&n);

ptr=(int *) malloc(n*sizeof(int));

for(int i=0;i<600;i++)

{

    ptr2=(int *) malloc(60000*sizeof(int));

    printf("Enter the value of element %d:\n",i+1);

    scanf("%d",&ptr[i]);

    free(ptr2);

}

for(int i=0;i<600;i++)

{

    printf("The value of element %d is:%d\n",i+1,ptr[i]);

   

}

 return 0;

}