View Compilation Error

0_0_6717014_24881.cpp: In function `void BFS()':
0_0_6717014_24881.cpp:27: error: `itoa' undeclared (first use this function)
0_0_6717014_24881.cpp:27: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6717014_24881.cpp: In function `int main()':
0_0_6717014_24881.cpp:55: error: `itoa' undeclared (first use this function)