View Compilation Error

0_0_34801620_1268.cpp: In function 'int main()':
0_0_34801620_1268.cpp:7:3: error: 'x' was not declared in this scope
   x=a;
   ^
0_0_34801620_1268.cpp:8:3: error: 'y' was not declared in this scope
   y=b;
   ^
0_0_34801620_1268.cpp:9:3: error: 'z' was not declared in this scope
   z=c;
   ^