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0_0_39351459_11880.cpp: In function 'int main()':
0_0_39351459_11880.cpp:5:15: error: 'scanf' was not declared in this scope
    5 |         while(scanf("%d%d",&a,&b)!=EOF){
      |               ^~~~~
0_0_39351459_11880.cpp:5:36: error: 'EOF' was not declared in this scope
    5 |         while(scanf("%d%d",&a,&b)!=EOF){
      |                                    ^~~
0_0_39351459_11880.cpp:1:1: note: 'EOF' is defined in header '<cstdio>'; did you forget to '#include <cstdio>'?
  +++ |+#include <cstdio>
    1 | 
0_0_39351459_11880.cpp:6:17: error: 'printf' was not declared in this scope
    6 |                 printf("%d\n",a+b);
      |                 ^~~~~~
0_0_39351459_11880.cpp:6:17: note: 'printf' is defined in header '<cstdio>'; did you forget to '#include <cstdio>'?