form1.cs

一个计算器

					if(this.textBox1.Text=="0")this.textBox1.Text="2";
			 else
				 this.textBox1.Text=this.textBox1.Text+"2";}
			if(this.textBox2.Text!="") this.textBox3.Text=this.textBox3.Text+"2";
		
		}

		private void button3_Click(object sender, System.EventArgs e)
		{
			if((this.textBox2.Text=="")&&(this.textBox1.Text!=""))
			{
					if(this.textBox1.Text=="0")this.textBox1.Text="3";
			 else
				 this.textBox1.Text=this.textBox1.Text+"3";}
			if(this.textBox2.Text!="") this.textBox3.Text=this.textBox3.Text+"3";
		
		}

		private void button4_Click(object sender, System.EventArgs e)
		{
			if((this.textBox2.Text=="")&&(this.textBox1.Text!=""))
			{
				if(this.textBox1.Text=="0")this.textBox1.Text="4";
				else
					this.textBox1.Text=this.textBox1.Text+"4";}
			if(this.textBox2.Text!="") this.textBox3.Text=this.textBox3.Text+"4";
		}

		private void button5_Click(object sender, System.EventArgs e)
		{
			if((this.textBox2.Text=="")&&(this.textBox1.Text!=""))
			{
				if(this.textBox1.Text=="0")this.textBox1.Text="5";
				else
					this.textBox1.Text=this.textBox1.Text+"5";}
			if(this.textBox2.Text!="") this.textBox3.Text=this.textBox3.Text+"5";
		}

		private void button6_Click(object sender, System.EventArgs e)
		{
			if((this.textBox2.Text=="")&&(this.textBox1.Text!=""))
			{
				if(this.textBox1.Text=="0")this.textBox1.Text="6";
				else
					this.textBox1.Text=this.textBox1.Text+"6";}
			if(this.textBox2.Text!="") this.textBox3.Text=this.textBox3.Text+"6";
		
		}

		private void button7_Click(object sender, System.EventArgs e)
		{
			if((this.textBox2.Text=="")&&(this.textBox1.Text!=""))
			{
				if(this.textBox1.Text=="0")this.textBox1.Text="7";
				else
					this.textBox1.Text=this.textBox1.Text+"7";}
			if(this.textBox2.Text!="") this.textBox3.Text=this.textBox3.Text+"7";
		}

		private void button8_Click(object sender, System.EventArgs e)
		{
			if((this.textBox2.Text=="")&&(this.textBox1.Text!=""))
			{
				if(this.textBox1.Text=="0")this.textBox1.Text="8";
				else
					this.textBox1.Text=this.textBox1.Text+"8";}
			if(this.textBox2.Text!="") this.textBox3.Text=this.textBox3.Text+"8";
		}

		private void button9_Click(object sender, System.EventArgs e)
		{
			if((this.textBox2.Text=="")&&(this.textBox1.Text!=""))
			{
				if(this.textBox1.Text=="0")this.textBox1.Text="9";
				else
					this.textBox1.Text=this.textBox1.Text+"9";}
			if(this.textBox2.Text!="") this.textBox3.Text=this.textBox3.Text+"9";
		}

		private void button10_Click(object sender, System.EventArgs e)
		{
			
			if((this.textBox2.Text=="")&&(this.textBox1.Text!="")&&(this.textBox1.Text!="0"))
				this.textBox1.Text=this.textBox1.Text+"0";
			//if(this.textBox1.Text=="0")this.textBox1.Text="0";
									
			if((this.textBox2.Text!="")&&(this.textBox2.Text!="/")&&(this.textBox3.Text!="0"))
				this.textBox3.Text=this.textBox3.Text+"0";
			if(this.textBox2.Text=="/")
				MessageBox.Show("零不能做除数，你傻啊！");
		
		}

		private void button11_Click(object sender, System.EventArgs e)
		{
			if(this.textBox1.Text!="")
			{
				this.textBox1.Text="";
				this.textBox2.Text="";
				this.textBox3.Text="";}
			else 
			{
					this.textBox1.Text="0";
		
			}	
		}

		private void button12_Click(object sender, System.EventArgs e)
		{
			if((this.textBox1.Text!="")&&(this.textBox3.Text==""))this.textBox2.Text="+";
			
			if((this.textBox1.Text!="")&&(this.textBox2.Text!="")&&(this.textBox3.Text!=""))
			{
				a=Int32.Parse(this.textBox1.Text);
				b=Int32.Parse(this.textBox3.Text);			
				switch (this.textBox2.Text)
				{
					case "+":a=a+b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="+";
						this.textBox3.Text="";
						break;
			
					case "-":a=a-b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="+";
						this.textBox3.Text="";
						break;
			
					case "*":a=a*b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="+";
						this.textBox3.Text="";
						break;
			
					case "/":a=a/b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="+";
						this.textBox3.Text="";
						break;	 
					default:
						break;}
			 
		 
			}
		}

		private void button13_Click(object sender, System.EventArgs e)
		{
			if((this.textBox1.Text!="")&&(this.textBox3.Text==""))this.textBox2.Text="-";
			
			if((this.textBox1.Text!="")&&(this.textBox2.Text!="")&&(this.textBox3.Text!=""))
			{
				a=Int32.Parse(this.textBox1.Text);
				b=Int32.Parse(this.textBox3.Text);			
				switch (this.textBox2.Text)
				{
					case "+":a=a+b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="-";
						this.textBox3.Text="";
						break;
			
					case "-":a=a-b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="-";
						this.textBox3.Text="";
						break;
			
					case "*":a=a*b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="-";
						this.textBox3.Text="";
						break;
			
					case "/":a=a/b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="-";
						this.textBox3.Text="";
						break;	 
					default:
						break;}
			 
		 
			}
		}

		private void button14_Click(object sender, System.EventArgs e)
		{
			if((this.textBox1.Text!="")&&(this.textBox3.Text==""))this.textBox2.Text="*";
			
			if((this.textBox1.Text!="")&&(this.textBox2.Text!="")&&(this.textBox3.Text!=""))
			{
				a=Int32.Parse(this.textBox1.Text);
				b=Int32.Parse(this.textBox3.Text);			
				switch (this.textBox2.Text)
				{
					case "+":a=a+b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="*";
						this.textBox3.Text="";
						break;
			
					case "-":a=a-b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="*";
						this.textBox3.Text="";
						break;
			
					case "*":a=a*b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="*";
						this.textBox3.Text="";
						break;
			
					case "/":a=a/b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="*";
						this.textBox3.Text="";
						break;	 
					default:
						break;}
			 
		 
			}
		
		}

		private void button15_Click(object sender, System.EventArgs e)
		{
			if((this.textBox1.Text!="")&&(this.textBox3.Text==""))this.textBox2.Text="/";
			
			if((this.textBox1.Text!="")&&(this.textBox2.Text!="")&&(this.textBox3.Text!=""))
			{
				a=Int32.Parse(this.textBox1.Text);
				b=Int32.Parse(this.textBox3.Text);			
				switch (this.textBox2.Text)
				{
					case "+":a=a+b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="/";
						this.textBox3.Text="";
						break;
			
					case "-":a=a-b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="/";
						this.textBox3.Text="";
						break;
			
					case "*":a=a*b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="/";
						this.textBox3.Text="";
						break;
			
					case "/":a=a/b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="/";
						this.textBox3.Text="";
						break;	 
					default:
						break;}
			 
		 
			}
		
		}

		private void button16_Click(object sender, System.EventArgs e)
		{  
			if((this.textBox1.Text!="")&&(this.textBox2.Text!="")&&(this.textBox3.Text!=""))
			
			
			{
				a=Int32.Parse(this.textBox1.Text);
				b=Int32.Parse(this.textBox3.Text);			
				switch (this.textBox2.Text)
				{
					case "+":a=a+b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="";
						this.textBox3.Text="";
						break;
			
					case "-":a=a-b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="";
						this.textBox3.Text="";
						break;
			
					case "*":a=a*b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="";
						this.textBox3.Text="";
						break;
			
					case "/":a=a/b;
						this.textBox1.Text=a.ToString();
						this.textBox2.Text="";
						this.textBox3.Text="";
						break;	 
					default:
						break;}
			
		
			}
			
			else if((this.textBox1.Text=="")&&(this.textBox2.Text=="")&&(this.textBox3.Text==""))
			{}
			else	MessageBox.Show("您的输入有误，不想说你，傻啊！");
		}

		private void button17_Click(object sender, System.EventArgs e)
		{
			if (this.textBox1.Text!="")
			{
				this.textBox1.Text="0";
				this.textBox2.Text="";
				this.textBox3.Text="";}
		}

		private void textBox4_TextChanged(object sender, System.EventArgs e)
		{
			//for(int i=0;i<=1000000000 ;i++)
			{
					if(i%2!=0)
			 {
				 
				 this.textBox4.Text="";}
			}
		
		
		}

		public void button18_Click(object sender, System.EventArgs e)
		{//for(int i=0;i<100 ;i++)
			
					//if(i%9==0)
		//if( Form.button18_Click(object sender, System.EventArgs e));
		{
			i++;	 
			if(i%2==0){System.DateTime currentTime=new System.DateTime(); 
				 currentTime=System.DateTime.Now; 
				 this.textBox4.Text=currentTime.ToString();}
			timer1.Enabled=true;}
			if(i%2!=0) {this.textBox4.Text="";
				timer1.Stop();
			}	
		}

		private void timer1_Tick_1(object sender, System.EventArgs e)
		{
		{
			
			System.DateTime currentTime=new System.DateTime(); 
			currentTime=System.DateTime.Now; 
			this.textBox4.Text=currentTime.ToString();}
		}

		
	
}
}