View Compilation Error

0_0_11741721_11837.cpp: In function `void SPFA(int)':
0_0_11741721_11837.cpp:12: error: `memset' undeclared (first use this function)
0_0_11741721_11837.cpp:12: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11741721_11837.cpp: In function `int main()':
0_0_11741721_11837.cpp:45: error: `memset' undeclared (first use this function)