View Compilation Error

0_0_16050920_32326.cpp: In function 'int main()':
0_0_16050920_32326.cpp:4:15: error: 'scanf' was not declared in this scope
  scanf("%d",&n);
               ^
0_0_16050920_32326.cpp:8:31: error: 'printf' was not declared in this scope
   printf("%d\n",(m+1)*(1<<m)/4);
                               ^