Tungdv_C_Lib

This is my own library for Data structure and Algorithm Language: C

Usage

For algorithm

1. After clone this repository, jump into directory Algorithm by cd Algorithm
2. Then type: make
3. cd ../TestAlgo
4. make
5. ./test

For data structure

Do the same but instead of Algorithm, jump into DataStructure folder and type make, then jump to TestData/List (or Stack or Queue) type make. Finally type ./test

Helpful information

• By typing make, you will run the default command in makefile.
• For library, ex: Algorithm, make will build a library *.a, copy to Implementation and copy the header files to Header.
• In the root directory, make will compile test.c with all including library into an executable file test.

Pointer

Warning

• Pointer is address, it point to address of 1 variable
• Only assign value to the value of pointer (*p) after allocation *p = (int *)malloc(sizeof(int)); or you could just: p = &a;
• Otherwise, error will occur (segmentation fault- core dumpted).

Pointer and value

• Pass pointer to a function, inside that function, change the value, after the function finished, value is changed.
• Pass pointer to a function, inside that function, change address of the pointer, after function finished, nothing is changed. To change address of pointer passed to a function, use pointer to pointer **.

NULL pointer is NOT the same as uninitialized pointer, AVOID uninitialized pointer

• An Uninitialized pointer will point to a random location: like 0x7ffe56f3d930, sometimes it = NULL
• A NULL pointer will exactly point to location with the name: (nil).