在我的控制器中,我有一个if功能,如下面的检查
char *a, *b, *c;
printf("%s\n", argv[0]);
a = argv[1];
b = argv[2];
c = argv[3];
int num1, num2;
num1 = convertToInt(a);
num2 = convertToInt(c);
switch (*b)
{
case '+':
result = num1 + num2;
break;
case '-':
result = num1 - num2;
break;
case 'x':
result = num1 * num2;
break;
case '/':
result = num1 / num2;
break;
case '%':
result = num1 % num2;
break;
}
}
printf( "%d\n", result );
有效输入
(model.products.ProductTypeID > 0 && categoryIdList != "" &&
model.products.ProductName != null && model.products.SellingPrice > 0 && model.products.BasicPrice > 0 && model.products.BuyingPrice > 0
&& model.products.ReorderQuantity > 0 && model.products.ReorderLevel > 0)
无效输入
2
2.2
2.22
我怎样才能检查售价0或者它有两个小数点,只要它有3个它不起作用
答案 0 :(得分:0)
$(function () {
$('.number-only').keypress(function (event) {
var $this = $(this);
if ((event.which != 46 || $this.val().indexOf('.') != -1) &&
((event.which < 48 || event.which > 57) &&
(event.which != 0 && event.which != 8))) {
event.preventDefault();
}
var text = $(this).val();
if ((event.which == 46) && (text.indexOf('.') == -1)) {
setTimeout(function () {
if ($this.val().substring($this.val().indexOf('.')).length > 3) {
$this.val($this.val().substring(0, $this.val().indexOf('.') + 3));
}
}, 1);
}
if ((text.indexOf('.') != -1) &&
(text.substring(text.indexOf('.')).length > 4) &&
(event.which != 0 && event.which != 8) &&
($(this)[0].selectionStart >= text.length - 4)) {
event.preventDefault();
}
});
$('.number-only').bind("paste", function (e) {
var text = e.originalEvent.clipboardData.getData('Text');
if ($.isNumeric(text)) {
if ((text.substring(text.indexOf('.')).length > 3) && (text.indexOf('.') > -1)) {
e.preventDefault();
$(this).val(text.substring(0, text.indexOf('.') + 3));
}
}
else {
e.preventDefault();
}
});
//$('.number-only').keypress(function (e) {
// if (isNaN(this.value + "" + String.fromCharCode(e.charCode))) return false;
//})
//.on("cut copy paste", function (e) {
// e.preventDefault();
//});
});
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input name="Tsm_Rate" id="Pr" placeholder="Price" class="form-control number-only" type="text"/>
&#13;
你可以使用j查询来做到这一点:_这里你只能输入十进制后的四位数,直到你得到小数点后你想要多少位数