View Compilation Error

0_0_4716574_18584.cpp: In function `int sig(double)':
0_0_4716574_18584.cpp:18: error: `d' undeclared (first use this function)
0_0_4716574_18584.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4716574_18584.cpp: At global scope:
0_0_4716574_18584.cpp:157: error: `double d[2003]' used prior to declaration