View Compilation Error

0_0_31118127_16355.cpp: In function 'int main()':
0_0_31118127_16355.cpp:21:26: error: 'c' was not declared in this scope
      printf("%d %d %d\n",c,b,a);
                          ^
0_0_31118127_16355.cpp:21:28: error: 'b' was not declared in this scope
      printf("%d %d %d\n",c,b,a);
                            ^
0_0_31118127_16355.cpp:21:30: error: 'a' was not declared in this scope
      printf("%d %d %d\n",c,b,a);
                              ^