需求:
要求把10进制转换成固定4个字节大小的16进制数。
例子:
1000 => 0x000003e8
11223344 => 0x00ab4130
function toHex(num){
var charArray = ['a','b','c','d','e','f']
var strArr = ['0','x','0','0','0','0','0','0','0','0']
var i = 9;
while(num > 15){
var yushu = num % 16;
if(yushu >= 10){
var index = yushu % 10;
strArr [i--] = charArray[index];
}else{
strArr[i--] = yushu.toString();
}
num = Math.floor(num/16);
}
if(num != 0){
if(num >= 10){
var index = num % 10;
strArr [i--] = charArray[index];
}else{
strArr[i--] = num.toString();
}
}
var hex = strArr.join('');
console.log(hex);
return hex;
}