View Compilation Error

0_0_11507228_13487.cpp: In function `void doo(int, int, long long int)':
0_0_11507228_13487.cpp:17: error: `h2' undeclared (first use this function)
0_0_11507228_13487.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11507228_13487.cpp:18: error: `h1' undeclared (first use this function)
0_0_11507228_13487.cpp:18: error: expected `)' before ']' token