View Compilation Error

0_0_22401733_17032.cpp: In function 'double gao(int, int)':
0_0_22401733_17032.cpp:26:40: error: expected ';' before ')' token
     for(int nn=0;nn<CX&&(ans-ans1>1e-9));nn++)
                                        ^
0_0_22401733_17032.cpp:26:42: error: 'nn' was not declared in this scope
     for(int nn=0;nn<CX&&(ans-ans1>1e-9));nn++)
                                          ^