通过正弦值求角度。多个正弦值（每行一个）的保存文件名为“sin.txt”,运行结果为正弦值分别对应的角度，存放在文件“angle.txt”。-By using sine value Angle.Multiple sine value (one per line) save the file named sin. TXT , the results of sine value respectively corresponding to the point of view, stored in a