View Compilation Error

0_0_11798372_18339.cpp:29: error: ISO C++ forbids declaration of `doubleGet_len' with no type
0_0_11798372_18339.cpp:34: error: ISO C++ forbids declaration of `doubleGet_ANS' with no type
0_0_11798372_18339.cpp: In function `int doubleGet_ANS(int)':
0_0_11798372_18339.cpp:39: error: `Get_len' undeclared (first use this function)
0_0_11798372_18339.cpp:39: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11798372_18339.cpp: In function `int main()':
0_0_11798372_18339.cpp:52: error: `Get_ANS' undeclared (first use this function)