View Compilation Error

0_0_15965401_9040.cpp: In function 'bool check()':
0_0_15965401_9040.cpp:49:27: error: 'memset' was not declared in this scope
   memset(deg,0,sizeof(deg));
                           ^
0_0_15965401_9040.cpp: In function 'int main()':
0_0_15965401_9040.cpp:76:27: error: 'memset' was not declared in this scope
     memset(eh,0,sizeof(eh));
                           ^