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<!DOCTYPE html>
< html lang = "zh" >
< head >
< meta charset = "UTF-8" >
< meta name = "viewport" content = "width=device-width, initial-scale=1.0" >
< title > 进制转换< / title >
< style >
body {
font-family : Arial , sans-serif ;
margin : 20 px ;
padding : 20 px ;
border : 1 px solid #ccc ;
border-radius : 10 px ;
max-width : 400 px ;
}
label , input , button {
display : block ;
margin-bottom : 10 px ;
}
# result {
font-weight : bold ;
}
< / style >
< / head >
< body >
< h2 > 任意进制转换器< / h2 >
< label for = "fromBase" > 输入进制 (2-16):< / label >
< input type = "number" id = "fromBase" min = "2" max = "16" required >
< label for = "number" > 输入数字:< / label >
< input type = "text" id = "number" placeholder = "例如： required >
< label for = "toBase" > 转换为进制 (2-16):< / label >
< input type = "number" id = "toBase" min = "2" max = "16" required >
< button id = "convertButton" > 转换< / button >
< h3 > 结果:< / h3 >
< div id = "result" > < / div >
< script >
document . getElementById ( 'convertButton' ) . addEventListener ( 'click' , ( ) => {
const fromBase = parseInt ( document . getElementById ( 'fromBase' ) . value ) ;
const number = document . getElementById ( 'number' ) . value . trim ( ) ;
const toBase = parseInt ( document . getElementById ( 'toBase' ) . value ) ;
// 验证输入的数字是否合法
if ( ! /^[0-9A-Fa-f]+$/ . test ( number ) || ! isValidForBase ( number , fromBase ) ) {
document . getElementById ( 'result' ) . textContent = '输入的数字不符合指定的进制规则！' ;
return ;
}
// 转换为十进制
const decimalValue = parseInt ( number , fromBase ) ;
const convertedValue = decimalValue . toString ( toBase ) . toUpperCase ( ) ;
// 显示结果
document . getElementById ( 'result' ) . textContent = convertedValue ;
} ) ;
function isValidForBase ( numStr , base ) {
const validChars = '0123456789ABCDEF' . slice ( 0 , base ) ;
return [ ... numStr ] . every ( char => validChars . includes ( char . toUpperCase ( ) ) ) ;
}
< / script >
< / body >
< / html >
