数组倒置 阶乘

数组倒置 class Program { static void Main(string[] args) { int[,] a = new int[,] { {1,3,5,7},{9,8,7,8},{5,89,56,8},{56,78,98,0}}; Console.WriteLine("数组倒置前的结果："); for (int i = 0; i < 4; i++) { for (int j = 0; j < 4; j++) { Console.Write(a[i,j].ToString()); Console.Write(" "); } Console.WriteLine(); } int m; for (int x = 0; x < 4;x++ ) { for (int y = x + 1; y < 4; y++) { m = a[x, y]; a[x, y]=a[y, x]; a[y, x] = m; } } Console.WriteLine("数组倒置后的结果是："); for (int i = 0; i < 4;i++ ) { for (int j = 0; j < 4; j++) { Console.Write(a[i,j].ToString()); Console.Write(" "); } Console.WriteLine(); } } } 阶乘

static long jc(long num) { if (num > 0) { return num *jc (num – 1); } else { return 1; }

}

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