0_0_13729846_30101.cpp:20:5: error: stray '\' in program if(n!=1)ret-=ret\n; ^ 0_0_13729846_30101.cpp: In function 'int Eular(int)': 0_0_13729846_30101.cpp:20:22: error: expected ';' before 'n' if(n!=1)ret-=ret\n; ^