View Compilation Error

0_0_27368845_8448.cpp: In function 'int main()':
0_0_27368845_8448.cpp:5:31: error: 'scanf' was not declared in this scope
     while(~scanf("%d %d",&n,&m))
                               ^
0_0_27368845_8448.cpp:12:22: error: 'printf' was not declared in this scope
       printf("%d\n",j);
                      ^