View Compilation Error

0_0_24821871_15805.cpp: In function 'int main()':
0_0_24821871_15805.cpp:4:25: error: 'scanf' was not declared in this scope
     while (scanf("%d",&m)!=EOF)
                         ^
0_0_24821871_15805.cpp:4:28: error: 'EOF' was not declared in this scope
     while (scanf("%d",&m)!=EOF)
                            ^
0_0_24821871_15805.cpp:13:22: error: 'printf' was not declared in this scope
     printf("%d\n",sum);
                      ^