谁能看一下该程序错在那里?

cjlmcxw

谁能看一下该程序错在那里：
求x的反正切值

#define pi  3.1415926
#include <math.h>  

D_L=atan(x)*(double(180/pi));试后有如下提示：
chong.c - 5 errors
  1132, 32 syntax error; found 'integer constant' expecting ')'.
  1132, 32 syntax error; found 'integer constant' expecting ')'.
  1132, 35 Cast from 'int' to 'double function' is illegal.
  1132, 38 syntax error; found ')' expecting ';'.
  1132, 38 Illegal statement termination.

cpubbs

atan(x)*(（double）(180/pi));

这样试试！