View Compilation Error

0_0_30804904_19244.cpp: In function 'int main()':
0_0_30804904_19244.cpp:6:53: error: 'y3' was not declared in this scope
     while(scanf("%.2lf%.2lf%.2lf%,2lf",&x1,&x2,&y2,&y3,)!=EOF)
                                                     ^
0_0_30804904_19244.cpp:6:56: error: expected primary-expression before ')' token
     while(scanf("%.2lf%.2lf%.2lf%,2lf",&x1,&x2,&y2,&y3,)!=EOF)
                                                        ^