-1.082825 0.000000 0.922023
0.992758 0.000000 0.922023
-1.082825 1.752861 0.922023
0.992758 1.752861 0.922023
-1.082825 1.752861 -0.677975
0.992758 1.752861 -0.677975
-1.082825 0.000000 -0.677975
0.992758 0.000000 -0.677975
设要读取第5行,如何判断,读取到x,y,z(坐标),多谢了。用C语言实现