View Compilation Error

0_0_8423739_16663.cpp:3: error: `LL' does not name a type
0_0_8423739_16663.cpp: In function `void gao(int, int)':
0_0_8423739_16663.cpp:10: error: `cnt' undeclared (first use this function)
0_0_8423739_16663.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8423739_16663.cpp: In function `int main()':
0_0_8423739_16663.cpp:19: error: `scanf' undeclared (first use this function)
0_0_8423739_16663.cpp:26: error: `cnt' undeclared (first use this function)
0_0_8423739_16663.cpp:26: error: `memset' undeclared (first use this function)
0_0_8423739_16663.cpp:50: error: `printf' undeclared (first use this function)