View Compilation Error

0_0_12113383_11614.cpp: In function `long long int merge_sort(long long int, long long int)':
0_0_12113383_11614.cpp:23: error: `count' undeclared (first use this function)
0_0_12113383_11614.cpp:23: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12113383_11614.cpp: In function `int main()':
0_0_12113383_11614.cpp:38: error: `count' undeclared (first use this function)