帮忙看看，怎么优化下 if else 太多了

int month=4,count=15000;//假定取值
float z;
float bl[][]={{0.35f,0.29f,0.22f,0.14f},{0.5f,0.45f,0.4f,0.35f},{0.6f,0.55f,0.5f,0.45f},{0.8f,0.75f,0.7f,0.65f},{1.2f,1.16f,1.13f,1.11f}}; f