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45_Mem_Manager.c
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45_Mem_Manager.c
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/*
Name : Prabhat Kiran
Date : 01st September 2022
Description : Provide a menu to manipulate or display the value of variable of type t.
Sample Input : 1) Menu :
1. Add element
2. Remove element
3. Display element
4. Exit from the program
Choice ---> 1
Enter the type you have to insert:
1. int
2. char
3. float
4. double
Choice ---> 2
Enter the char : k
1. Add element
2. Remove element
3. Display element
4. Exit from the program
Choice ---> 3
-------------------------
0 -> k
-------------------------
1. Add element
2. Remove element
3. Display element
4. Exit from the program
Choice ---> 1
Enter the type you have to insert:
1. int
2. char
3. float
4. double
Choice ---> 1
Enter the int : 10
1. Add element
2. Remove element
3. Display element
4. Exit from the progrm
Choice ---> 3
------------------------
0 -> k (char)
1 -> 10 (int)
------------------------
1. Add element
2. Remove element
3. Display element
4. Exit from the program
Choice ---> 2
0 -> k
1 -> 10
Enter the index value to be deleted : 0
index 0 successfully deleted.
1. Add element
2. Remove element
3. Display element
4. Exit from the program
Choice ---> 4
*/
#include <stdio.h>
#include <stdlib.h>
void add_element (void*, char[]); //To add the particular element as per user's choice.
void remove_element (void*, char[]); //To remove the particular element as per user's choice.
void display_element (void*, char[]); //To display the particular element as per user's choice.
char status [6]; //Current status of Memory allocation as per the Index.
int main()
{
char flag [6] = {0}, choice;
/*
flag[0] = First char flag, flag[1] = Second char flag, flag[2] = short flag, flag[3] = int flag, flag[4] = float flag and flag[5] = double flag.
*/
void* num = malloc (8 * sizeof (char));
do
{
printf ("Menu :\n1. Add element\n2. Remove element\n3. Display element\n4. Exit from the program\n");
printf ("Choice ---> ");
scanf ("%hhu", &choice); //To read the user's choice for the particular Task to be executed.
printf ("---------------------------------------------------------------------------------------\n");
switch (choice)
{
case 1 :
{
add_element (num, flag); //Function call to insert an element.
}
break;
case 2 :
{
remove_element (num, flag); //Function call to remove an element.
}
break;
case 3:
{
display_element (num, flag); //Function call to display the elements index-wise.
}
break;
case 4 : printf ("Thank you for using the Memory Manager!\n");
break;
default : printf ("You entered the wrong Choice. Please enter the Choice between 1 to 4!\n");
}
printf ("---------------------------------------------------------------------------------------\n");
} while (choice !=4); //The loop will run till the user enters the option to exit the program i.e. value of 'choice' = 4.
free (num);
return 0;
}
void add_element (void* n, char f[])
{
char ch;
printf ("Enter the Type you have to Insert :\n1. int\n2. char\n3. short\n4. float\n5. double\n");
printf ("Choice ---> ");
scanf ("%hhu", &ch); //To read the user's choice for inserting a particular type of Data.
printf ("---------------------------------------------------------------------------------------\n");
switch (ch)
{
case 1 : //If the user wants to insert an Integer.
{
if ((f [3] == 0) && (f [4] == 0) && (f [5] == 0)) //If the int flag, float flag and double flag is '0', then only the user can enter the Data.
{
printf ("Enter the int : ");
scanf ("%d", (int*) (n + 4)); //Read the int data from user at position (n+4).
f [3] = 1; //Update the int flag as '1'.
}
else
{
printf ("Memory is Full!\n");
}
}
break;
case 2 : //If the user wants to insert a Character.
{
if ((f [0] == 0) && (f [5] == 0)) //If the first char flag and double flag is '0', then only the user can enter the Data.
{
printf ("Enter the char : ");
scanf (" %c", (char*) n); //Read the char data from user at position (n).
f [0] = 1; //Update the first char flag as '1'.
}
else if ((f [1] == 0) && (f [5] == 0)) //If the second char flag and double flag is '0', then only the user can enter the Data.
{
printf ("Enter the char : ");
scanf (" %c", (char*) (n + 1)); //Read the char data from user at position (n+1).
f [1] = 1; //Update the second char flag as '1'.
}
else
{
printf ("Memory is Full!\n");
}
}
break;
case 3 : //If the user wants to insert a Short.
{
if ((f [2] == 0) && (f [5] == 0)) //If the short flag and double flag is '0', then only the user can enter the Data.
{
printf ("Enter the short : ");
scanf ("%hd", (short*) (n + 2)); //Read the short data from user at position (n+2).
f [2] = 1; //Update the short flag as '1'.
}
else
{
printf ("Memory is Full!\n");
}
}
break;
case 4 : //If the user wants to insert a Float.
{
if ((f [3] == 0) && (f [4] == 0) && (f [5] == 0)) //If the int flag, float flag and double flag is '0', then only the user can enter the Data.
{
printf ("Enter the float : ");
scanf ("%f", (float*) (n + 4)); //Read the float data from user at position (n+4).
f [4] = 1; //Update the float flag as '1'.
}
else
{
printf ("Memory is Full!\n");
}
}
break;
case 5 : //If the user wants to insert a Double.
{
//If all the flags are '0', then only the user can enter the Data.
if ((f [5] == 0) && (f [0] == 0) && (f [1] == 0) && (f [2] == 0) && (f [3] == 0) && (f [4] == 0))
{
printf ("Enter the double : ");
scanf ("%lf", (double*) n); //Read the double data from user at position (n).
f [5] = 1; //Update the double flag as '1'.
}
else
{
printf ("Memory is Full!\n");
}
}
break;
default : printf ("You entered the wrong Choice. Please enter the Choice between 1 to 5!\n");
}
return;
}
void remove_element (void* n, char f[])
{
display_element (n, f); //Function call to display the current memory allocation index-wise.
if ((f [0] == 0) && (f [1] == 0) && (f [2] == 0) && (f [3] == 0) && (f [4] == 0) && (f [5] == 0))
{
return;
}
printf ("---------------------------------------------------------------------------------------\n");
char ch;
printf ("Enter the Index value you want to Delete :\n");
printf ("Choice ---> ");
scanf (" %hhu", &ch); //To read the user's choice for deleting a particular type of Data.
printf ("---------------------------------------------------------------------------------------\n");
switch (status [ch]) //As per the current status of memory allocation, the index value chosen by user is passed to the Switch case.
{
case 'A' : //If the user wants to delete the first Character.
{
if (f [0] == 1) //If the first char flag is '1', then we have a Character data stored in the memory.
{
f [0] = 0; //Update the first char flag as '0'.
printf ("Character value successfully deleted.\n");
}
else
{
printf ("No Character value present to be deleted.\n");
}
}
break;
case 'B' : //If the user wants to delete the second Character.
{
if (f [1] == 1) //If the second char flag is '1', then we have a Character data stored in the memory.
{
f [1] = 0; //Update the second char flag as '0'.
printf ("Character value successfully deleted.\n");
}
else
{
printf ("No Character value present to be deleted.\n");
}
}
break;
case 'C' : //If the user wants to delete a Short.
{
if (f [2] == 1) //If the short flag is '1', then we have a Short data stored in the memory.
{
f [2] = 0; //Update the short flag as '0'.
printf ("Short value successfully deleted.\n");
}
else
{
printf ("No Short value present to be deleted.\n");
}
}
break;
case 'D' : //If the user wants to delete an Integer.
{
if (f [3] == 1) //If the int flag is '1', then we have an Integer data stored in the memory.
{
f [3] = 0; //Update the int flag as '0'.
printf ("Integer value successfully deleted.\n");
}
else
{
printf ("No Integer value present to be deleted.\n");
}
}
break;
case 'E' : //If the user wants to delete a Float.
{
if (f [4] == 1) //If the float flag is '1', then we have a Float data stored in the memory.
{
f [3] = 0; f [4] = 0; //Update the float flag as '0'.
printf ("Float value successfully deleted.\n");
}
else
{
printf ("No Float value present to be deleted.\n");
}
}
break;
case 'F' : //If the user wants to delete a Double.
{
//If all the other flags are '0' and the double flag is '1', then we have a Double data stored in the memory.
if ((f [0] == 0) && (f [1] == 0) && (f [2] == 0) && (f [3] == 0) && (f [4] == 0) && (f [5] == 1))
{
f [0] = 0; f [1] = 0; f [2] = 0; //Update all the flags as '0'.
f [3] = 0; f [4] = 0; f [5] = 0;
printf ("Double value successfully deleted.\n");
}
else
{
printf ("No Double value present to be deleted.\n");
}
}
break;
default : printf ("You entered the wrong Choice. Please enter the Choice as per the Index value displayed!\n");
}
return;
}
void display_element (void* n, char f[])
{
char c;
for (c = 0; c < 6; c++) //To reset the current status of all the Indices as '0'.
status [c] = 0;
c = 0;
if (f [0] == 1) //If the first char flag is '1', display it as the 'cth' index value.
{
printf ("%d -> %c (char)\n", c, *(char*) n);
status [c] = 'A'; //'A' value allocated for the first Character at current Index.
c += 1; //Update the index value for next element.
}
if (f [1] == 1) //If the second char flag is '1', display it as the 'cth' index value.
{
printf ("%d -> %c (char)\n", c, *(char*) (n + 1));
status [c] = 'B'; //'B' value allocated for the second Character at current Index.
c += 1; //Update the index value for next element.
}
if (f [2] == 1) //If the short flag is '1', display it as the 'cth' index value.
{
printf ("%d -> %hd (short)\n", c, *(short*) (n + 2));
status [c] = 'C'; //'C' value allocated for the Short at current Index.
c += 1; //Update the index value for next element.
}
if (f [3] == 1) //If the int flag is '1', display it as the 'cth' index value.
{
printf ("%d -> %d (int)\n", c, *(int*) (n + 4));
status [c] = 'D'; //'D' value allocated for the Integer at current Index.
c += 1; //Update the index value for next element.
}
if (f [4] == 1) //If the float flag is '1', display it as the 'cth' index value.
{
printf ("%d -> %f (float)\n", c, *(float*) (n + 4));
status [c] = 'E'; //'E' value allocated for the Float at current Index.
c += 1; //Update the index value for next element.
}
//If all the other flags are '0' and the double flag is '1', display it as the 'cth' index value.
if ((f [0] == 0) && (f [1] == 0) && (f [2] == 0) && (f [3] == 0) && (f [4] == 0) && (f [5] == 1))
{
printf ("%d -> %lf (double)\n", c, *(double*) n);
status [c] = 'F'; //'F' value allocated for the Double at current Index.
}
//If all the flags are '0', "No data" message to be displayed.
if ((f [0] == 0) && (f [1] == 0) && (f [2] == 0) && (f [3] == 0) && (f [4] == 0) && (f [5] == 0) )
{
printf ("No Data is stored in the Memory currently!\n");
}
return;
}