将双精度舍入到最近的uint64_t

#include <iostream>
#include <cmath>
#include <cstdint>

uint64_t roundToUint64(double value) {
    if (value < 0) {
        // Handle negative numbers
        // Additional processing or error handling
    }

    if (std::abs(value) > std::numeric_limits<uint64_t>::max()) {
        // Handle overflow
        // Additional processing or error handling
    }

    double integerPart = std::floor(value);
    double decimalPart = value - integerPart;

    if (decimalPart >= 0.5) {
        integerPart += 1;
    }

    return static_cast<uint64_t>(integerPart);
}

int main() {
    double value = 1234.5678;
    uint64_t result = roundToUint64(value);
    std::cout << "Rounded value: " << result << std::endl;

    return 0;
}