View Compilation Error

0_0_19814698_18491.cpp: In function 'int hungary()':
0_0_19814698_18491.cpp:31:36: error: 'memset' was not declared in this scope
     memset(linker,-1,sizeof(linker));  
                                    ^
0_0_19814698_18491.cpp: In function 'int main()':
0_0_19814698_18491.cpp:48:29: error: 'memset' was not declared in this scope
         memset(g,0,sizeof(g));  
                             ^