0_0_16394663_12806.cpp:21:9: error: stray '\' in program double b = (1.0-alpha)\n; ^ 0_0_16394663_12806.cpp: In function 'int main()': 0_0_16394663_12806.cpp:21:32: error: expected ',' or ';' before 'n' double b = (1.0-alpha)\n; ^