View Compilation Error

0_0_26159132_22379.cpp: In function 'int main()':
0_0_26159132_22379.cpp:8:15: error: lvalue required as left operand of assignment
   if(p==0.0||q=1.0)puts("0.00");
               ^
0_0_26159132_22379.cpp:9:19: error: lvalue required as left operand of assignment
   else if(p=1.0||q=0.0)puts("1.00");
                   ^