View Compilation Error

0_0_36785307_5229.cpp: In function 'int main()':
0_0_36785307_5229.cpp:5:22: error: 'A' was not declared in this scope
  while(scanf("%d%d",&A,&B);
                      ^
0_0_36785307_5229.cpp:5:25: error: 'B' was not declared in this scope
  while(scanf("%d%d",&A,&B);
                         ^
0_0_36785307_5229.cpp:5:27: error: expected ')' before ';' token
  while(scanf("%d%d",&A,&B);
                           ^
0_0_36785307_5229.cpp:6:16: error: 'A' was not declared in this scope
  printf("%d\n",A+B);
                ^
0_0_36785307_5229.cpp:6:18: error: 'B' was not declared in this scope
  printf("%d\n",A+B);
                  ^