free example in C

Header file:

    stdlib.h

Synopsis:

     void free(void *ptr);

Description:

       It deallocates the memory block pointed by ptr.

free function C example:

  #include<stdio.h>
  #include<stdlib.h>
  #include<string.h>
  struct db {
        char name[50];
        int age;
  };

  int main() {
        struct db *data;
        char *str;
        str = (char *)malloc(20);
        strncpy(str, "Student detail: ", 20);
        data = (struct db*)malloc(sizeof (struct db));
        strcpy(data->name, "Micheal Jackson");
        data->age = 10;
        printf("%s\nName: %s\n", str, data->name);
        printf("Age: %d\n", data->age);
        free(data);
        free(str);
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/$ ./a.out
  Student detail:
  Name: Micheal Jackson
  Age: 10