该程序的作用是得出在LT码中，译码开销对译码成功率的影响。其中，该LT码度分布为理想孤子分布，译码算法是BP译码算法。-The purpose of this program is to find out the influence of decoding overhead on decoding success rate in LT codes. Among them, the LT code distribution is ideal soliton distribution, decodi