View Compilation Error

0_0_24348833_5963.cpp: In function 'int getmatch()':
0_0_24348833_5963.cpp:90:34: error: 'memset' was not declared in this scope
  memset(matchx, 0, sizeof(matchx));
                                  ^
0_0_24348833_5963.cpp: In function 'int main()':
0_0_24348833_5963.cpp:114:29: error: 'memset' was not declared in this scope
   memset(com, 0, sizeof(com));
                             ^