View Compilation Error

0_0_3943037_30873.cpp: In function `int main()':
0_0_3943037_30873.cpp:35: error: `itoa' undeclared (first use this function)
0_0_3943037_30873.cpp:35: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3943037_30873.cpp:42: error: `_atoi' undeclared (first use this function)