View Compilation Error

0_0_34705528_4479.cpp: In function 'int hungary()':
0_0_34705528_4479.cpp:40:36: error: 'memset' was not declared in this scope
     memset(linker,-1,sizeof(linker));
                                    ^
0_0_34705528_4479.cpp: In function 'int main()':
0_0_34705528_4479.cpp:76:23: error: 'memset' was not declared in this scope
   memset(g,0,sizeof(g));
                       ^