本文实例讲述了c#实现的简单整数四则运算计算器功能。分享给大家供大家参考，具体如下：
运行效果图如下：
具体代码如下：
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using system;using system.collections.generic;using system.componentmodel;using system.data;using system.drawing;using system.text;using system.windows.forms;namespace 计算器{ public partial class form1 : form { public form1() { initializecomponent(); } public string num; public int flag;//用于判断输入的操作符 public double num1, num2; private void num0_button_click(object sender, eventargs e) { num = num + "0"; num2 = convert.todouble(num); textbox.text = num; } private void num1_button_click(object sender, eventargs e)//重点算法1 { if (textbox.text == "0") { num = "1"; textbox.text = convert.tostring(num); } else { num = num + "1"; num2 = convert.todouble(num); textbox.text = num; } } private void num2_button_click(object sender, eventargs e) { if (textbox.text == "0") { num = "2"; textbox.text = convert.tostring(num); } else { num = num + "2"; num2 = convert.todouble(num); textbox.text = num; } } private void num3_button_click(object sender, eventargs e) { if (textbox.text == "0") { num = "3"; textbox.text = convert.tostring(num); } else { num = num + "3"; num2 = convert.todouble(num); textbox.text = num; } } private void num4_button_click(object sender, eventargs e) { if (textbox.text == "0") { num = "4"; textbox.text = convert.tostring(num); } else { num = num + "4"; num2 = convert.todouble(num); textbox.text = num; } } private void num5_button_click(object sender, eventargs e) { if (textbox.text == "0") { num = "5"; textbox.text = convert.tostring(num); } else { num = num + "5"; num2 = convert.todouble(num); textbox.text = num; } } private void num6_button_click(object sender, eventargs e) { if (textbox.text == "0") { num = "6"; textbox.text = convert.tostring(num); } else { num = num + "6"; num2 = convert.todouble(num); textbox.text = num; } } private void num7_button_click(object sender, eventargs e) { if (textbox.text == "0") { num = "7"; textbox.text = convert.tostring(num); } else { num = num + "7"; num2 = convert.todouble(num); textbox.text = num; } } private void num8_button_click(object sender, eventargs e) { if (textbox.text == "0") { num = "8"; textbox.text = convert.tostring(num); } else { num = num + "8"; num2 = convert.todouble(num); textbox.text = num; } } private void num9_button_click(object sender, eventargs e) { if (textbox.text == "0") { num = "9"; textbox.text = convert.tostring(num); } else { num = num + "9"; num2 = convert.todouble(num); textbox.text = num; } } private void add_button_click(object sender, eventargs e)//重点算法2 { if (textbox.text.length > 0) { num1 = convert.todouble(textbox .text); num = ""; flag = 1; textbox.text = ""; textbox.focus(); } } private void dev_button_click(object sender, eventargs e) { if (textbox.text.length > 0) { num1 = convert.todouble(textbox.text); num = ""; flag = 2; textbox.text = ""; textbox.focus(); } } private void mul_button_click(object sender, eventargs e) { if (textbox.text.length > 0) { num1 = convert.todouble(textbox.text); num = ""; flag = 3; textbox.text = ""; textbox.focus(); } } private void chu_button_click(object sender, eventargs e) { if (textbox.text.length > 0) { num1 = convert.todouble(textbox.text); num = ""; flag = 4; // textbox.text = ""; textbox.focus(); } } private void equ_button_click(object sender, eventargs e) { switch (flag) { case 1: textbox.text = convert.tostring(num1+convert .todouble(num));//重点算法3 num2 = convert.todouble(textbox .text); break; case 2: textbox.text = convert.tostring(num1 - convert.todouble(num)); num2 = convert.todouble(textbox.text); break; case 3: textbox.text = convert.tostring(num1 * convert.todouble(num)); num2 = convert.todouble(textbox.text); break; case 4: textbox.text = convert.tostring(num1 / convert.todouble(num)); num2 = convert.todouble(textbox.text); break; } } private void re_button_click(object sender, eventargs e) { num = ""; textbox.text = "0"; } }} |
希望本文所述对大家c#程序设计有所帮助。
原文链接：http://blog.csdn.net/lovequanxin/article/details/5527694
