在C++中设置字符串格式时，删除双精度型中的所有尾随零

#include <iostream>
#include <string>

std::string removeTrailingZeros(double number) {
    std::string str = std::to_string(number);
    size_t dotPos = str.find('.');
    
    if (dotPos != std::string::npos) {
        size_t nonZeroPos = str.size() - 1;
        while (nonZeroPos > dotPos && str[nonZeroPos] == '0') {
            nonZeroPos--;
        }
        if (str[nonZeroPos] == '.') {
            nonZeroPos--;
        }
        str = str.substr(0, nonZeroPos + 1);
    }
    
    return str;
}

int main() {
    double number = 123.45000;
    std::string formattedStr = removeTrailingZeros(number);
    std::cout << formattedStr << std::endl;
    
    return 0;
}