View Compilation Error

0_0_6410865_25861.cpp: In function `void dtw(int, int, int)':
0_0_6410865_25861.cpp:10: error: `cnt' undeclared (first use this function)
0_0_6410865_25861.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6410865_25861.cpp:10: error: `abs' undeclared (first use this function)
0_0_6410865_25861.cpp:21: error: return-statement with a value, in function returning 'void'