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0_0_26762840_30266.cpp:2:169: fatal error: GCC4.9.2/lib/gcc/x86_64-w64-mingw32/4.9.2/include/math.h>in: Invalid argument
 #include<math.h>int main(){double d,x1,x2,y1,y2;while(1){scanf("%lf%lf%lf%lf",&x1,&y1,&x2,&y2);d=sqrt(((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)));printf("%.2lf\n",d);}return 0;}
                                                                                                                                                                         ^
compilation terminated.