View Compilation Error

0_0_36506683_28382.cpp: In function 'int main()':
0_0_36506683_28382.cpp:9:16: error: 'c1' was not declared in this scope
         memset(c1,0,sizeof c1);
                ^
0_0_36506683_28382.cpp:10:16: error: 'c2' was not declared in this scope
         memset(c2,0,sizeof c2);
                ^