Update README.md

Author: darshangouda

README.md

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 This repository provides a C++ implementation of a direct base-to-base conversion algorithm supporting arbitrary bases from 2 to 62. The algorithm converts numbers directly from source base \(B_1\) to target base \(B_2\) without intermediate decimal conversion, maintaining exact precision for both integer and fractional parts using integer-only array-based arithmetic. **The core method can be extended to support base 2 input to any target base.** See the accompanying paper for full theoretical details and extension possibilities.
 
 **Paper:** "Direct Base-to-Base Conversion Algorithm: Integer and Fractional Parts with Array-Based Arithmetic"  
-**Zenodo DOI:** [10.5281/zenodo.17735748](https://doi.org/10.5281/zenodo.17735748)
+**Zenodo:** [![DOI](https://zenodo.org/badge/1104673032.svg)](https://doi.org/10.5281/zenodo.17735748)