View Compilation Error

0_0_36309558_29617.cpp: In function 'int main()':
0_0_36309558_29617.cpp:4:7: error: expected unqualified-id before '[' token
  auto [a, b] = std::pair<int, int>();
       ^
0_0_36309558_29617.cpp:5:24: error: 'a' was not declared in this scope
  while(~scanf("%d%d", &a, &b)) printf("%d\n", a + b);
                        ^
0_0_36309558_29617.cpp:5:28: error: 'b' was not declared in this scope
  while(~scanf("%d%d", &a, &b)) printf("%d\n", a + b);
                            ^