private void button1_Click(object sender, EventArgs e)
{
int a = 10, b = 20;
int x = Convert.ToInt32(this.textBox1.Text);
int y = Convert.ToInt32(this.textBox2.Text);
int c = a*x + (b*y);
MessageBox.Show(c.ToString());
}
不太明白你的意思。。
float a,x,b,y,c;
x=float.Parse(TextBox1.Text);
y=float.Parse(TextBox2.Text);
c=ax+by;