View Compilation Error

0_0_1519738_30448.cpp: In function `void merge(int, int, int)':
0_0_1519738_30448.cpp:17: error: `count' undeclared (first use this function)
0_0_1519738_30448.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1519738_30448.cpp: In function `int main()':
0_0_1519738_30448.cpp:43: error: `count' undeclared (first use this function)