Gananayantra-Rusting (ગણનયંત્ર)

A comprehensive Rust-based calculator suite inspired by industry-standard tools.

Features

1. Fitness & Health

• BMI: Body Mass Index with WHO categories.
• Calorie/BMR: Mifflin-St Jeor equation for metabolic rate and maintenance.
• Body Fat: U.S. Navy Method (circumference-based).
• Pregnancy Tools: Due date (Naegele's Rule) and conception estimation.

2. Financial

• Business Loan: Calculate monthly payments, total interest, and total payoff.

3. Math

• Basic Operations: Addition, subtraction, multiplication, and division.

4. Advertising

• CPM: Cost Per Mille (thousand impressions) calculator for ad campaigns.

5. E-Commerce

• Discounts: Calculate savings and sale prices.
• Profit Margin: Calculate gross profit and margin percentages.

Usage

Run the CLI using Cargo:

cargo run

Follow the on-screen prompts to select a category and input the required data.

Security & Safety

• No Data Storage: Calculations are performed locally; no personal health or financial data is stored.
• Input Validation: Basic checks for division by zero and valid numeric input.

Installation

Add to your Cargo.toml:

[dependencies]
gananayantra-rusting = "0.1.1"