Main.cc:1:7: error: expected nested-name-specifier before ‘System’ using System; ^~~~~~ Main.cc:5:16: error: expected ‘:’ before ‘static’ public static void Main(string[] args){ ^~~~~~ Main.cc:5:33: error: ‘string’ has not been declared public static void Main(string[] args){ ^~~~~~ Main.cc:5:42: error: expected ‘,’ or ‘...’ before ‘args’ public static void Main(string[] args){ ^~~~ Main.cc:25:6: error: expected ‘;’ after class definition } ^ ; Main.cc: In static member function ‘static void Questions::Program::Main(int*)’: Main.cc:6:21: error: expected primary-expression before ‘int’ int n = int.Parse(Console.ReadLine()); ^~~ Main.cc:9:25: error: expected primary-expression before ‘int’ int a = int.Parse(Console.ReadLine()); ^~~ Main.cc:12:21: error: ‘Console’ was not declared in this scope Console.WriteLine(1); ^~~~~~~ Main.cc:15:20: warning: decomposition declaration only available with -std=c++1z or -std=gnu++1z int[] data = new int[a + 1]; ^ Main.cc:15:20: error: decomposition declaration cannot be declared with type ‘int’ int[] data = new int[a + 1]; ^~ Main.cc:15:20: note: type must be cv-qualified ‘auto’ or reference to cv-qualified ‘auto’ Main.cc:15:20: error: empty decomposition declaration Main.cc:15:23: error: expected initializer before ‘data’ int[] data = new int[a + 1]; ^~~~ Main.cc:16:17: error: ‘data’ was not declared in this scope data[1] = data[2] = 1; ^~~~ Main.cc:21:17: error: ‘Console’ was not declared in this scope Console.WriteLine(data[a]); ^~~~~~~ Main.cc:23:13: error: ‘Console’ was not declared in this scope Console.ReadKey(); ^~~~~~~