View Compilation Error

0_0_11099117_2883.cpp: In function `char* OP(char*, char*, char)':
0_0_11099117_2883.cpp:87: error: `_atoi64' undeclared (first use this function)
0_0_11099117_2883.cpp:87: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11099117_2883.cpp:94: error: `_i64toa' undeclared (first use this function)
0_0_11099117_2883.cpp: In function `long long int calc(char*)':
0_0_11099117_2883.cpp:128: error: `_atoi64' undeclared (first use this function)