View Compilation Error

0_0_31100237_16339.cpp: In function 'int main()':
0_0_31100237_16339.cpp:31:12: error: 'x1' was not declared in this scope
         if(x1 < 0) 
            ^
0_0_31100237_16339.cpp:32:22: error: 'x2' was not declared in this scope
    printf("%.10lf\n",x2);
                      ^
0_0_31100237_16339.cpp:37:23: error: 'x2' was not declared in this scope
     printf("%.10lf\n",x2);
                       ^
0_0_31100237_16339.cpp:41:1: error: expected '}' at end of input
 }
 ^