View Compilation Error

0_0_39633852_29016.cpp: In function 'int main()':
0_0_39633852_29016.cpp:8:12: error: 'scanf' was not declared in this scope
    8 |         if(scanf("%d",&M)!=1)
      |            ^~~~~
0_0_39633852_29016.cpp:12:13: error: 'scanf' was not declared in this scope
   12 |             scanf("%d",&num);
      |             ^~~~~
0_0_39633852_29016.cpp:15:9: error: 'printf' was not declared in this scope
   15 |         printf("%d\n",sum);
      |         ^~~~~~
0_0_39633852_29016.cpp:1:1: note: 'printf' is defined in header '<cstdio>'; did you forget to '#include <cstdio>'?
  +++ |+#include <cstdio>
    1 | int main() {