View Compilation Error

0_0_3073240_5500.cpp: In function `Trie* New()':
0_0_3073240_5500.cpp:38: error: `ram' undeclared (first use this function)
0_0_3073240_5500.cpp:38: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3073240_5500.cpp: In function `int main()':
0_0_3073240_5500.cpp:132: error: `ram' undeclared (first use this function)