View Compilation Error

0_0_17520091_28948.cpp: In function 'int main()':
0_0_17520091_28948.cpp:6:26: error: expected ')' before numeric constant
     while(scanf("%lf",&r)1=EOF)
                          ^
0_0_17520091_28948.cpp:6:27: error: lvalue required as left operand of assignment
     while(scanf("%lf",&r)1=EOF)
                           ^
0_0_17520091_28948.cpp:9:5: error: 'else' without a previous 'if'
     else
     ^