View Compilation Error

0_0_18892332_25804.cpp: In function 'void init()':
0_0_18892332_25804.cpp:3:38: error: 'memset' was not declared in this scope
 #define clr(x,y) memset(x,y,sizeof(x))
                                      ^
0_0_18892332_25804.cpp:40:5: note: in expansion of macro 'clr'
     clr(maze,0);
     ^