View Compilation Error

0_0_14161982_24842.cpp: In function 'int main()':
0_0_14161982_24842.cpp:8:34: error: 'a' was not declared in this scope
         scanf("%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e);
                                  ^
0_0_14161982_24842.cpp:8:37: error: 'b' was not declared in this scope
         scanf("%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e);
                                     ^
0_0_14161982_24842.cpp:8:40: error: 'c' was not declared in this scope
         scanf("%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e);
                                        ^
0_0_14161982_24842.cpp:8:43: error: 'd' was not declared in this scope
         scanf("%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e);
                                           ^
0_0_14161982_24842.cpp:8:46: error: 'e' was not declared in this scope
         scanf("%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e);
                                              ^