以下程序的输出结果是 class Program { static int c = 3; static double f( int a) { c += 1; a = c; return a; } static void Main( string [] args) { int a=0, i, k=0 ; for (i = 0;i<=1;i++)< span=""> { k =( int ) f(a); a = a + 1; } Console .WriteLine( "{0}" , k); Console .ReadLine(); } }