View Compilation Error

0_0_22269307_21182.cpp: In function 'int main()':
0_0_22269307_21182.cpp:21:29: error: 'a' was not declared in this scope
         printf("%d %d %d\n",a, b, c);
                             ^
0_0_22269307_21182.cpp:21:32: error: 'b' was not declared in this scope
         printf("%d %d %d\n",a, b, c);
                                ^
0_0_22269307_21182.cpp:21:35: error: 'c' was not declared in this scope
         printf("%d %d %d\n",a, b, c);
                                   ^