View Compilation Error

0_0_30723273_20759.cpp: In function 'int main()':
0_0_30723273_20759.cpp:5:4: error: 'doubie' was not declared in this scope
    doubie x1,x2,y1,y2;
    ^
0_0_30723273_20759.cpp:6:32: error: 'x1' was not declared in this scope
    while(scanf("%lf%lf%lf%lf",&x1,&x2,&y1,&y2)!EOF)
                                ^
0_0_30723273_20759.cpp:6:36: error: 'x2' was not declared in this scope
    while(scanf("%lf%lf%lf%lf",&x1,&x2,&y1,&y2)!EOF)
                                    ^
0_0_30723273_20759.cpp:6:40: error: 'y1' was not declared in this scope
    while(scanf("%lf%lf%lf%lf",&x1,&x2,&y1,&y2)!EOF)
                                        ^
0_0_30723273_20759.cpp:6:44: error: 'y2' was not declared in this scope
    while(scanf("%lf%lf%lf%lf",&x1,&x2,&y1,&y2)!EOF)
                                            ^
0_0_30723273_20759.cpp:6:47: error: expected ')' before '!' token
    while(scanf("%lf%lf%lf%lf",&x1,&x2,&y1,&y2)!EOF)
                                               ^
0_0_30723273_20759.cpp:6:51: error: expected ';' before ')' token
    while(scanf("%lf%lf%lf%lf",&x1,&x2,&y1,&y2)!EOF)
                                                   ^