This is a C language implementation of an LDPC (Low-Density Parity-Check) decoder. LDPC codes are a type of error-correcting codes widely used in data communication and storage systems to improve the reliability of data transmission.

• Supports flood algorithm and layer algorithm.
• Supports spa algorithm, ms algorithm and self-correct ms algorithm.
• Provides functions for matrix simplification, encoding, decoding, and error rate calculation.
• Supports different Signal-to-Noise Ratio (SNR) settings and configurable number of decoding iterations.

1. Initialize LDPC Decoder: Referencing the H.txt format, use the ldpc_init function to initialize the decoder.
2. Set Configuration: Set parameters such as SNR, number of iterations and decode algorithm using the ldpc_set_config function.
3. Calculate Error Rates: Use the ldpc_simulation function to calculate the bit error rate and block error rate.

• Compile the Code: Compile the source code using a C compiler (such as gcc).
• Execute: Run the compiled executable and perform tests.

• Ensure understanding of each parameter and function in the code before use.
• Modifications and adjustments may be necessary depending on specific application requirements.