小编Rae*_*ven的帖子

每次我使用:

time.strftime("%z")

我明白了:

Eastern Daylight Time

但是,我希望UTC偏移量为+ HHMM或-HHMM.我甚至尝试过:

time.strftime("%Z")

仍然产生:

Eastern Daylight Time

我已经阅读了几个与strftime()相关的其他帖子,%z似乎总是以正确的+ HHMM或-HHMM格式返回UTC偏移量.如何让strftime()以+ HHMM或-HHMM格式输出python 3.3？

编辑:我正在运行Windows 7

我正在尝试编写一个makefile,它使用宏一次从多个文件创建多个可执行文件.我试着通过以前回答的问题进行搜索,但是因为我对C语言编程以及与gcc一起工作相当新,所以我无法找到问题的答案.

这是我到目前为止:

CC=gcc
CFLAGS=-I.
OBJ = ex1.c ex3.c
EXECUTABLE = ex1 ex3

$(EXECUTABLE): $(OBJ)
    gcc -o $@ $^ $(CFLAGS)

clean:
    rm -f $(EXECUTABLE)

我想要这条线

$(EXECUTABLE): $(OBJ)

分别从文件ex1.c ex3.c创建可执行文件ex1和ex3.

I'm working through "The C Programming Language" by K&R and example 1.5 has stumped me:

#include <stdio.h>

/* copy input to output; 1st version */
int main(int argc, char *argv[])
{
    int c;

    while ((c = getchar()) != EOF)
        putchar(c);

    return 0;
}

I understand that 'getchar()' takes a character for 'putchar()' to display. However, when I run the program in terminal, why is it that I can pass an entire line of characters for 'putchar()' to display?

我正在尝试编写一个连续读取串行输入的函数。该函数必须能够处理与串行端口的意外断开，并在可能的情况下重新连接。尽管阅读了 stackOverflow 上的几个问题帖子并浏览了 pySerial 文档，但我尚未找到解决方案。

这是我的代码：

def serialRead(serialPort, queue):
    """Adds serial port input to a queue."""

    ser = serial.Serial(serialPort - 1, timeout = 2)

    ser.parity = "O"
    ser.bytesize = 7

    while(True):
        try:
            if(ser == None):
                ser = serial.Serial(serialPort - 1, timeout = 2)

                ser.parity = "O"
                ser.bytesize = 7

                print("Reconnecting")

            queue.put(ser.read(27))
            ser.write(chr(6).encode())

            print("Writing Data...")

        except:
            if(not(ser == None)):
                ser.close()
                ser = None
                print("Disconnecting")

            print("No Connection")
            time.sleep(2)

这是我的输出：

Enter a Serial Port: 7
Writing Data...
Writing Data...
Writing Data...
Writing Data... …

我正在通过 K&R C 工作，而 GCC 继续给我这个错误，例如 1.9：

arrays.c:4:5: error: conflicting types for ‘getline’
/usr/include/stdio.h:675:20: note: previous declaration of ‘getline’ was here
arrays.c:27:5: error: conflicting types for ‘getline’
/usr/include/stdio.h:675:20: note: previous declaration of ‘getline’ was here
make: *** [arrays] Error 1

我的代码是：

#include <stdio.h>
#define MAXLINE 1000    /* maximum input line size */

int getline(char line[], int maxline);
void copy(char to[], char from[]);

/* print longest input line */
int main()
{
    int len;            /* current line length */
    int max; …