Problem Set 1: C

Deadline: 18 September 2026

Complete these five tasks in order:

Each task must be written in standard C and compile in your local development environment. Use stdio.h and scanf when a program needs input; do not use course-specific C libraries.

Folder structure

Organize your source files as follows:

cs105-week-1/
├── world/
│   └── hello.c
├── me/
│   └── hello.c
├── mario/
│   └── mario.c
├── coins/
│   └── coins.c
└── credit/
    └── credit.c

Do not include compiled executables in your submission.

Before you submit

Check that:

all five source files are present;
each program compiles without errors;
you tested normal inputs and the edge cases listed on each task page;
indentation and variable names are consistent; and
each program contains brief comments where the logic is not obvious.

How to submit

Create a public GitHub repository named cs105-week-1.
Upload or push the five folders shown above to the repository.
Open the repository link in a private/incognito browser window to confirm that it is publicly accessible.
Email the repository link to odina.kholiqov@dii.tj.
Use the subject CS105 Week 1 — Your full name and include your full name in the email.

Do not attach a ZIP file or compiled executables.

Return to the Week 1 notes.