for循环：求用户输入的整数范围内的奇数之和与偶数之和。
代码如下：
protected void Button1_Click(object sender, EventArgs e)
{
//Num1,Num2是起止数
int Num1, Num2;
Num1 = int.Parse(txtNum1.Text);
Num2 = int.Parse(txtNum2.Text);
if (Num1 < Num2)
{
___________(1)____________ //函数调用
}
else {
_____________(2)___________________ //函数调用
}
}
void Cal(int x, int y) {
//sumodd是奇数之和，sumeven是偶数之和
int sumeven = 0, sumodd = 0;
for (int i =_________(3)____________)
{
if (__________(4)____________)
{
___________(5)_____________
}
else
{
______________(6)_________________
}
}
Label1.Text = x.ToString() + "至" + y.ToString() + "的奇数之和为" + sumodd.ToString();
Label2.Text = x.ToString() + "至" + y.ToString() + "的偶数之和为" + sumeven.ToString();
}
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