View Compilation Error

0_0_14560385_13250.cpp: In function 'void init()':
0_0_14560385_13250.cpp:3:39: error: 'memset' was not declared in this scope
 #define clr(a,b)  memset(a,b,sizeof(a))
                                       ^
0_0_14560385_13250.cpp:14:5: note: in expansion of macro 'clr'
     clr(ant,0);
     ^
0_0_14560385_13250.cpp: In function 'int main()':
0_0_14560385_13250.cpp:3:39: error: 'memset' was not declared in this scope
 #define clr(a,b)  memset(a,b,sizeof(a))
                                       ^
0_0_14560385_13250.cpp:36:13: note: in expansion of macro 'clr'
             clr(vis,0);
             ^