Question

我试图在Linux上编写一个打印当前日期的C程序。在巴西，我希望它以dd / mm / yyyy格式打印，在美国，它将以mm / dd / yyyy格式打印。

我认为＆＃34;％x＆＃34; strftime的说明符应该是诀窍，但它以mm / dd / yyyy格式打印。

#include <stdio.h>
#include <time.h>

int main(){

  struct tm local_now;
  {
    time_t now;
    time(&now);
    struct tm *tmp = localtime(&now);
    local_now = *tmp;
  }

  char buf[20];
  strftime(buf, sizeof buf, "%x", &local_now);

  printf("%s\n", buf);

  return 0;
}

这是我从运行locale命令获得的输出：

LANG=en_US.UTF-8
LANGUAGE=en_US
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC=pt_BR.UTF-8
LC_TIME=pt_BR.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=pt_BR.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=pt_BR.UTF-8
LC_NAME=pt_BR.UTF-8
LC_ADDRESS=pt_BR.UTF-8
LC_TELEPHONE=pt_BR.UTF-8
LC_MEASUREMENT=pt_BR.UTF-8
LC_IDENTIFICATION=pt_BR.UTF-8
LC_ALL=

显然忽略了LC_TIME=pt_BR.UTF-8设置？

Answer 1

strftime和所有其他依赖于语言环境的函数默认使用“C”语言环境。要使用用户区域设置，必须在程序初始化期间显式调用setlocale函数：

setlocale

如果将空字符串传递给function duplicateSpreadSheets() { var sheetName, sheet, destination, currentDate; sheetName = "Name of sheet goes here"; sheet = SpreadsheetApp.getActiveSpreadsheet() .getSheetByName(sheetName); destination = SpreadsheetApp.openById("Spreadsheet ID goes here (the first string of nubmers and letters in the url)"); sheet = SpreadsheetApp.getActiveSpreadsheet() .getSheetByName("Copy of " + sheetName) .activate(); currentDate = new Date(Date.now()); //change the format of the date to what you want, DD/MM/YYYY etc. SpreadsheetApp.getActiveSpreadsheet() .renameActiveSheet(currentDate) }，那么它将根据标准语言环境变量（LC_ALL，LC_TIME等）选择语言环境。

如何使用当前区域设置打印日期？

1 个答案: