BEWARE
They said that, the best way to learn something is by apply it irl. So i decide, the best way to learn C is by making something. The hope is that, during the process i learn new things about C and then after made many things, i can master the fundamentals of C.
- About : Program to calculate the day of the week from any date that user input.
- Point of Interest : i learn something call "mapping value to dictionary"-ish. It basically made if-statement more programmatic?
- Things i learn :
- Get array length using 'sizeof'. To get array length by divide array's (as whole) bytes, with the first item in array's byte.
- You need 'strcmp' to compare two strings. If strcmp return '0', that means the strings is same.
- There is something called "pointer" in C, i'm still confused about this.
- Strings are char but in an array form.
- To Run it :
$ make project=DayOfWeekFromDate $ ./DayOfWeekFromDate - Reference :
- Art of Memory. 2023. "How to Calculate the Day of the Week from Any Date"
- About : Program to convert Digit to binary and vice versa.
- Point of Interest : The program can take command line arguments.
- Things i learn :
- Learn something about 'typedef struct'. It is similiar to class (in some aspects)
- Learn how to use 'calloc'. I use it to initialize new empty array.
- Learn to convert to char into int, with the help of '(int)' and 'atoi'. '(int)' is for single char and 'atoi' for string.
- To Run it :
$ make project=DigitToBinary $ ./DigitToBinary - Reference :
- Koretskyi, Max. 2016. "The simple math behind decimal-binary conversion algorithms"
- Quora. 2022. "How many bits does it take to represent a number?"
- GeeksforGeeks. 2023. "Command Line Arguments in C/C++"
To Debug something, run this command :
$ make project=<Project name here> debug=y
It will take you into gdb environment?, type 'quit' to exit.