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| #include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int *heap_list[16];
void init() {
setvbuf(stdout,0,2,0);
setvbuf(stderr,0,2,0);
setvbuf(stdin,0,2,0);
memset(heap_list, 0, sizeof(heap_list));
}
void menu() {
printf("1. Add a new note\n");
printf("2. Delete a note\n");
printf("3. Edit a note\n");
printf("4. Check the note\n");
printf("5. Exit\n");
puts("Your choice: ");
}
void add_note()
{
for(int i=0; i<16; i++)
{
if(!heap_list[i])
{
char size[8];
int size_num ;
char *note;
while(1)
{
printf("Size: ");
read(0, size, 4);
size_num = atoi(size);
note=(char *) malloc(size_num);
heap_list[i]=(int*)note;
if(size_num <=0)
{
puts("invalid size");
continue;
}
else
{
break;
}
}
if(!note)
{
puts("Memory allocation failed!");
exit(2);
}
printf("Content: ");
read(0, note, size_num);
printf("Note %d added successfully!\n",i);
break;
}
else if(i >= 15)
{
puts("Heap is full!");
break;
}
}
}
void delete_note()
{
char buf[8];
int index_num;
printf("Index: ");
read(0, buf, 4);
index_num = atoi(buf);
if(index_num < 0 || index_num > 15)
{
puts("Invalid index");
return;
}
if(heap_list[index_num])
{
free(heap_list[index_num]);
heap_list[index_num] = NULL;
puts("Note deleted successfully!");
}
else
{
puts("Free corrupted!");
exit(3);
}
}
void edit_note()
{
puts("Please enter the index of the note you want to edit:");
char buf[8];
int index_num;
read(0, buf, 4);
index_num = atoi(buf);
if(index_num < 0 || index_num > 15)
{
puts("Invalid index");
return;
}
else
{
size_t current_size = malloc_usable_size(heap_list[index_num]);
puts("Please enter the new content:");
read(0, heap_list[index_num], current_size-1);
((char *)heap_list[index_num])[current_size-1] = '\0';
}
}
void check_note()
{
puts("Please enter the index of the note you want to edit:");
char buf[8];
int index_num;
read(0, buf, 4);
index_num = atoi(buf);
if (index_num < 0 || index_num > 15)
{
puts("Invalid index");
return;
}
else
{
printf("Note %d: %s\n", index_num, (char *)heap_list[index_num]);
}
}
int main()
{
init();
char choice[8];
printf("Welcome to the note management system!\n");
printf("Gift %p", &puts);
while (1)
{
menu();
read(0, choice, 8);
switch (atoi(choice))
{
case 1:
add_note();
break;
case 2:
delete_note();
break;
case 3:
edit_note();
break;
case 4:
check_note();
break;
case 5:
puts("Bye!");
exit(0);
break;
default :
puts("Invalid choice");
break;
}
}
return 0;
}
|