我的程序中有一个变量v,它可以从值集中获取任何值
"a", "b", "c", ..., "z"
而我的目标是只有当执行一些说法v是不"x","y"或"z".
我试过了,
对于类C语言(其中相等运算符比较实际的字符串值;例如.c#,javascript,php)
if (v != "x" || v != "y" || v != "z")
{
// the statements I want to be executed
// if v is neither "x", nor "y", nor "z"
}
用于Pascal类语言(例如plsql)
IF (v != 'x' OR v != 'y' OR v != 'z') THEN
-- the statements …language-agnostic if-statement multiple-languages control-flow