convert 6-Jun-2024 time format to 20240606 time format

convert-time-format-2.cpp

#include <iostream>
#include <string>
#include <sstream>
#include <iomanip>
#include <ctime>
#include <map>

// 函数：将月份缩写转换为数字
int monthToNumber(const std::string& month) {
    static std::map<std::string, int> monthMap = {
        {"Jan", 1}, {"Feb", 2}, {"Mar", 3},
        {"Apr", 4}, {"May", 5}, {"Jun", 6},
        {"Jul", 7}, {"Aug", 8}, {"Sep", 9},
        {"Oct", 10}, {"Nov", 11}, {"Dec", 12}
    };
    return monthMap[month];
}

// 函数：将6-Jun-2024格式转换为20240606格式
std::string convertDateFormat(const std::string& date) {
    std::istringstream iss(date);
    std::string dayStr, monthStr, yearStr;
    std::getline(iss, dayStr, '-');
    std::getline(iss, monthStr, '-');
    std::getline(iss, yearStr, '-');

    int day = std::stoi(dayStr);
    int month = monthToNumber(monthStr);
    int year = std::stoi(yearStr);

    std::tm timeStruct = {};
    timeStruct.tm_year = year - 1900; // tm_year是从1900年开始计算的
    timeStruct.tm_mon = month - 1;    // tm_mon是从0开始的，所以要减1
    timeStruct.tm_mday = day;

    char buffer[9]; // 8字符+1终止符
    std::strftime(buffer, sizeof(buffer), "%Y%m%d", &timeStruct);

    return std::string(buffer);
}

int main() {
    std::string date = "6-Jun-2024";
    std::string formattedDate = convertDateFormat(date);
    std::cout << "Converted Date: " << formattedDate << std::endl;
    return 0;
}

convert-time-format.cpp

#include <iostream>
#include <string>
#include <sstream>
#include <iomanip>
#include <map>

// 函数：将月份缩写转换为数字
int monthToNumber(const std::string& month) {
    static std::map<std::string, int> monthMap = {
        {"Jan", 1}, {"Feb", 2}, {"Mar", 3},
        {"Apr", 4}, {"May", 5}, {"Jun", 6},
        {"Jul", 7}, {"Aug", 8}, {"Sep", 9},
        {"Oct", 10}, {"Nov", 11}, {"Dec", 12}
    };
    return monthMap[month];
}

// 函数：将6-Jun-2024格式转换为20240606格式
std::string convertDateFormat(const std::string& date) {
    std::istringstream iss(date);
    std::string dayStr, monthStr, yearStr;
    std::getline(iss, dayStr, '-');
    std::getline(iss, monthStr, '-');
    std::getline(iss, yearStr, '-');

    int day = std::stoi(dayStr);
    int month = monthToNumber(monthStr);
    int year = std::stoi(yearStr);

    std::ostringstream oss;
    oss << year << std::setw(2) << std::setfill('0') << month << std::setw(2) << std::setfill('0') << day;
    return oss.str();
}

int main() {
    std::string date = "6-Jun-2024";
    std::string formattedDate = convertDateFormat(date);
    std::cout << "Converted Date: " << formattedDate << std::endl;
    return 0;
}