View Compilation Error

0_0_32861624_4929.cpp: In function 'void getprime()':
0_0_32861624_4929.cpp:11:29: error: 'memset' was not declared in this scope
     memset(vis,0,sizeof(vis));
                             ^
0_0_32861624_4929.cpp: In function 'int main()':
0_0_32861624_4929.cpp:60:19: error: 'scanf' was not declared in this scope
     scanf("%d", &t);
                   ^
0_0_32861624_4929.cpp:64:35: error: 'memset' was not declared in this scope
         memset(cnt, 0, sizeof(cnt));
                                   ^
0_0_32861624_4929.cpp:80:28: error: 'printf' was not declared in this scope
         printf("%I64d\n", L);
                            ^