代码和运行窗口已经截图
num1,num2分别为第一个第二个整数,运行代码后,无输出结果,而且窗口卡住
2条回答 默认 最新
- threenewbee 2018-11-20 13:37关注
不能写在Text3_Changed里,要写在按钮的click里
你在Text3_Changed里修改Text3.Text,导致又触发了新的Text3_Changed,如此这般,最后导致堆栈溢出。using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace Q714037 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { int a = int.Parse(num1.Text); int b = int.Parse(num2.Text); for (int i = a; i <= b; i++) { bool p = true; for (int j = 2; j <= i / 2; j++) if (i % j == 0) { p = false; break; } if (p && i >= 2) num3.Text += i.ToString() + " "; } } private void button2_Click(object sender, EventArgs e) { num3.Text = ""; } } } 窗体设计文件: namespace Q714037 { partial class Form1 { /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// Clean up any resources being used. /// </summary> /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.label1 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label(); this.num1 = new System.Windows.Forms.TextBox(); this.num2 = new System.Windows.Forms.TextBox(); this.label3 = new System.Windows.Forms.Label(); this.num3 = new System.Windows.Forms.TextBox(); this.button1 = new System.Windows.Forms.Button(); this.button2 = new System.Windows.Forms.Button(); this.SuspendLayout(); // // label1 // this.label1.AutoSize = true; this.label1.Location = new System.Drawing.Point(126, 20); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(115, 13); this.label1.TabIndex = 0; this.label1.Text = "求两个数之前的素数"; // // label2 // this.label2.AutoSize = true; this.label2.Location = new System.Drawing.Point(19, 52); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(67, 13); this.label2.TabIndex = 1; this.label2.Text = "第一个整数"; // // num1 // this.num1.Location = new System.Drawing.Point(92, 49); this.num1.Name = "num1"; this.num1.Size = new System.Drawing.Size(86, 20); this.num1.TabIndex = 2; // // num2 // this.num2.Location = new System.Drawing.Point(279, 49); this.num2.Name = "num2"; this.num2.Size = new System.Drawing.Size(86, 20); this.num2.TabIndex = 4; // // label3 // this.label3.AutoSize = true; this.label3.Location = new System.Drawing.Point(206, 52); this.label3.Name = "label3"; this.label3.Size = new System.Drawing.Size(67, 13); this.label3.TabIndex = 3; this.label3.Text = "第二个整数"; // // num3 // this.num3.Location = new System.Drawing.Point(20, 89); this.num3.Multiline = true; this.num3.Name = "num3"; this.num3.Size = new System.Drawing.Size(344, 177); this.num3.TabIndex = 5; // // button1 // this.button1.Location = new System.Drawing.Point(92, 280); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(70, 22); this.button1.TabIndex = 6; this.button1.Text = "找素数"; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.button1_Click); // // button2 // this.button2.Location = new System.Drawing.Point(236, 280); this.button2.Name = "button2"; this.button2.Size = new System.Drawing.Size(70, 22); this.button2.TabIndex = 7; this.button2.Text = "清除"; this.button2.UseVisualStyleBackColor = true; this.button2.Click += new System.EventHandler(this.button2_Click); // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(390, 323); this.Controls.Add(this.button2); this.Controls.Add(this.button1); this.Controls.Add(this.num3); this.Controls.Add(this.num2); this.Controls.Add(this.label3); this.Controls.Add(this.num1); this.Controls.Add(this.label2); this.Controls.Add(this.label1); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); this.PerformLayout(); } #endregion private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; private System.Windows.Forms.TextBox num1; private System.Windows.Forms.TextBox num2; private System.Windows.Forms.Label label3; private System.Windows.Forms.TextBox num3; private System.Windows.Forms.Button button1; private System.Windows.Forms.Button button2; } }
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