如何使用此方法添加计数器？

Question

case 3: // Record Daily Activity
    for (iOption = 3; iDayNum++;)
        Console.WriteLine("Record a Daily Activity"); //Lets the user know which option they selected.

我希望程序每次选择选项3时计算一天，但我收到以下错误：

Cannot implicitly convert type 'int' to 'bool'
Use of unassigned local variable 'iDayNum'

Answer 1

由于问题缺乏背景，我假设在这里有一些东西。简单的增量怎么样？

//Initialization somewhere...
int iDayNum = 0;

switch(iOption)
{
    case 3:
        iDayNum++;
        Console.WriteLine("Record a Daily Activity");
        Break;
    default:
        Break;
}