View Compilation Error

0_0_31623161_23058.cpp: In function 'int fun(int, int)':
0_0_31623161_23058.cpp:11:40: error: 'printf' was not declared in this scope
             printf("%d ",((float)sum)/k);
                                        ^
0_0_31623161_23058.cpp:16:35: error: 'printf' was not declared in this scope
         printf("%d",((float)sum)/k);
                                   ^