View Compilation Error

298231_0_26811.cpp: In function `int turn(char*)':
298231_0_26811.cpp:15: error: `itoa' undeclared (first use this function)
298231_0_26811.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
298231_0_26811.cpp: In function `int main()':
298231_0_26811.cpp:26: error: `itoa' undeclared (first use this function)