Question

我有这两个char数组，它们在控制台（DESKTOP-KDOD9T）上输出相同的值，一个从文件中读取，另一个通过winsock gethostname接收。相比之下，它们并不相同。它说您无法访问该程序。

#!/bin/bash -e

# Note: it is a script to solve Ubuntu 18.04 LTS 
#       different version of pythons compiling
#       header confliction problems
#
# The idea is got from @JustAnotherArivist
# From URL: https://github.com/pyenv/pyenv/issues/945
#
# The script used in here is with slightly modifications
# to fit many different SSL header versions


# First under your home directory make OpenSSL library
# and extract useful package

mkdir ~/libssl1.0-dev
cd ~/libssl1.0-dev
apt-get download libssl1.0-dev
ar x libssl1.0-dev* data.tar.xz
tar -xf data.tar.xz --strip-components=2


# Second, specifically get your current system's SSL headers
# and make symbolic-links

libcrypto=$(ls /usr/lib/x86_64-linux-gnu/ | grep libcrypto.so......)
libssl=$(ls /usr/lib/x86_64-linux-gnu/ | grep libssl.so......)

ln -s /usr/lib/x86_64-linux-gnu/${libcrypto} ~/libssl1.0-dev/lib/x86_64-linux-gnu
ln -s /usr/lib/x86_64-linux-gnu/${libssl} ~/libssl1.0-dev/lib/x86_64-linux-gnu


# Set your CFLAGS LDFLAGS compile options
# And use pyenv install the python version <3.4.5 or <3.5.3

# Note: it is a one line command
# Please change the version of python that you want to compile
CFLAGS="-I${HOME}/libssl1.0-dev/include -I${HOME}/libssl1.0-dev/include/x86_64-linux-gnu" \
LDFLAGS="-L${HOME}/libssl1.0-dev/lib/x86_64-linux-gnu" \
pyenv install 3.4.2


# Remove tempor libssl1.0-dev direcotory
rm -rf ~/libssl1.0-dev

Answer 1

数组没有可以比较的值。它们包含多个值。

当您比较两个数组时，这些数组会衰减到指针，并且您正在比较指针以查看它们是否指向同一对象。当然，他们没有。

如果要比较每个字节，可以使用类似memcmp的函数。如果要比较两个字符串，可以使用类似strcmp的函数。

为什么这两个字符数组不相等？

1 个答案: