View Compilation Error

0_0_36378761_7846.cpp: In function 'int main()':
0_0_36378761_7846.cpp:37:18: error: 'a' was not declared in this scope
             cin>>a>>b>>c;
                  ^
0_0_36378761_7846.cpp:37:21: error: 'b' was not declared in this scope
             cin>>a>>b>>c;
                     ^
0_0_36378761_7846.cpp:37:24: error: 'c' was not declared in this scope
             cin>>a>>b>>c;
                        ^