wangjia
21 lines
689 B
Dart
21 lines
689 B
Dart
/// 分转元字符串，千分位分组 + 两位小数，纯整数运算（金额禁 float）。
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///
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/// 例：299900 → "2,999.00"；100 → "1.00"；0 → "0.00"；负数保留符号。
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String yuanFromMinor(int minor) {
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final negative = minor < 0;
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final abs = negative ? -minor : minor;
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final yuan = abs ~/ 100;
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final cents = abs % 100;
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final yuanDigits = yuan.toString();
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final len = yuanDigits.length;
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final buffer = StringBuffer();
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for (var i = 0; i < len; i++) {
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if (i > 0 && (len - i) % 3 == 0) buffer.write(',');
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buffer.write(yuanDigits[i]);
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}
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final centsStr = cents.toString().padLeft(2, '0');
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return '${negative ? '-' : ''}$buffer.$centsStr';
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}
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