View Compilation Error

0_0_19200411_17560.cpp: In function 'int main()':
0_0_19200411_17560.cpp:29:24: error: 'scanf' was not declared in this scope
     while(scanf("%d",&n) && n){
                        ^
0_0_19200411_17560.cpp:32:29: error: 'memset' was not declared in this scope
         memset(g,0,sizeof(g));
                             ^
0_0_19200411_17560.cpp:57:50: error: 'printf' was not declared in this scope
             printf("White wins by %d\n",sumw-sumb);
                                                  ^
0_0_19200411_17560.cpp:59:50: error: 'printf' was not declared in this scope
             printf("Black wins by %d\n",sumb-sumw);
                                                  ^
0_0_19200411_17560.cpp:60:31: error: 'printf' was not declared in this scope
         } else printf("Draw\n");
                               ^