取个位
int i = 1234567; Response.Write((i-i / 10* 10)); //实际运行 //1234567 - (1234567/10 = 123456 *10= 1234560 ) //1234567-1234560
依次类推
public void 取个位数到百位数() { int i = 1234567; for (int k = 1; k <= 3; k++) { //取个位 //System.Diagnostics.Trace.WriteLine( (i - i / 10 * 10) ); int n = (int)Math.Pow(10, k); //取第N位 System.Diagnostics.Trace.WriteLine( ( i - i / n * n)*10/n ); } } /// <summary> /// 求num在n位上的数字,取个位,取十位 /// </summary> /// <param name="num">正整数</param> /// <param name="n">所求数字位置(个位 1,十位 2 依此类推)</param> public int FindNum(int num, int n) { //int power = 1; //for (int i = 0; i < n; i++) //{ // power *= 10; //} int power = (int)Math.Pow(10, n); return (num - num / power * power) * 10 / power; }