Labs

This is a repository of codes that I work on while solving problems, codes that I experiment on while learning a topic in computer science. The directory 'docs' is meant to keep all the documents, links, etc that I think are helpful in getting some idea of different topics in computer science or otherwise that I explore.

Compilation

Following command may be used to compile a .c file:

gcc -Wall <filename>

Following command may be used to compile a .java file:

javac <filename>

Run a Java program:

/Library/Java/JavaVirtualMachines/<jdk_version>/Contents/Home/bin/java \
-Dfile.encoding=UTF-8 -classpath \
/Users/<user_id>/Desktop/labs/bin codeforces.<class_name>

Run with verbose: java -verbose

Execution

Execute c code

The above command for compiling a .c file generates object file with the name a.out. Following command may be used to execute the object file:

./a.out

If execute permission is not given to the object file, following command may be used to assign the execute permission:

chmod u+x a.out

The above command assigns execute permission to the user owner of the file a.out. This permission may be validated either by executing the object file a.out as per above command or by listing the details of file by the command:

ls -l a.out

Check memory leak

Execute the following command to check mem-leak for the object file generated after compiling the c code:

valgrind -v --tool=memcheck --leak-check=yes ./a.out

Execute Java code

The compilation of a .java file with javac command (as given above) generates a .class file which can be run by the following command:

java <filename without extension>

Run a python code

Following command may be executed to run a python file:

python <filename>
or,
python3 <filename>

Check inconsistent use of tabs and spaces

Run the following command(s):

python -tt <filename>
python -m tabnanny -v .

Run a GoLang code

Following command can be executed to run a Go file:

go run hello.go

Build a Go code

Following command can be executed to build the binary from a Go file:

go build hello.go