View Compilation Error

0_0_37159604_6427.cpp: In function 'int hungary(int)':
0_0_37159604_6427.cpp:20:37: error: 'memset' was not declared in this scope
     memset(linker, -1, sizeof linker);
                                     ^
0_0_37159604_6427.cpp: In function 'int main()':
0_0_37159604_6427.cpp:38:30: error: 'memset' was not declared in this scope
         memset(G, 0, sizeof G);
                              ^