View Compilation Error

0_0_31988884_26839.cpp: In function 'int main()':
0_0_31988884_26839.cpp:23:29: error: 'x' was not declared in this scope
         printf("%c %c %c\n",x,y,z);
                             ^
0_0_31988884_26839.cpp:23:31: error: 'y' was not declared in this scope
         printf("%c %c %c\n",x,y,z);
                               ^
0_0_31988884_26839.cpp:23:33: error: 'z' was not declared in this scope
         printf("%c %c %c\n",x,y,z);
                                 ^